User:Benwing2/test-is-ndecl-f-2

feminine part 2

no ending in lemma part 2

plural mostly in -ir

plural mostly in -ir, without suffix

NOTE: About unumut: in words with -ir plural, the un-u-mutated form is used there, e.g. gjöf, fjöður. With -ar it's presumably the same, while with -ur, the u-mutated form should be used due to the -u- in the ending.
tíð (“time”); gen in -ar, pl in -ir (defaults); also árás (“attack”), ást (“love”), átt (“direction”), blokk (“block”), bón (“request”), borg (“city”), járnbraut (“railroad”), búð (“shop, store”), dós (“can”), dyggð (“virtue”) (also dygð), eign (“possession, property”), ferð (“journey”), framkvæmd (“performance”), frétt (“piece of news”), gerð (“action; product; make, type”), gæs (“goose”), heyrn (“hearing”), hæð (“height; story (of a house)”), krús (“jar; pitcher”), lausn (“solution”), leið (“way”), lengd (“length”), lund (“temper, disposition”), lykt (“smell; (plural) end”), mynd (“picture”), mynt (“coin”), nefnd (“committee”), ósk (“wish”), raun (“trial, experience; grief”) (tilraun (“experiment”)), rós (“rose”), sál (“soul”) (often confused with sála of the same meaning, leading to mixture of forms such as gen pl sálna; also sál (“skin bag”) is a different word with plural in -ar), sekt (“fine (penalty)”), sjón (“sight”), skák (“chess”), skúr (“rain shower”) (also masculine), sókn (“parish”), sveit (“district; community; military unit”), tign (“nobility, rank”), þyngd (“weight”), ætt (“family, lineage”)

Declension of tíð (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	tíð	tíðin	tíðir	tíðirnar
accusative	tíð	tíðina	tíðir	tíðirnar
dative	tíð	tíðinni	tíðum	tíðunum
genitive	tíðar	tíðarinnar	tíða	tíðanna

gjörð (“action”) (NOTE: does not have 'unumut'; jö due to breaking from gerð?

Declension of gjörð (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	gjörð	gjörðin	gjörðir	gjörðirnar
accusative	gjörð	gjörðina	gjörðir	gjörðirnar
dative	gjörð	gjörðinni	gjörðum	gjörðunum
genitive	gjörðar	gjörðarinnar	gjörða	gjörðanna

gjöf (“gift”); gen in -ar, pl in -ir (defaults), needs un-u-mutation; also áhöfn (“crew”), björk (“birch”), dögg (“dew”), fjöl (“board”), höfn (“harbor”), löpp (“paw”), röð (“row, series”), sög (“saw”), tjörn (“pond, small lake”), vör (“lip”), þjöl (“file”), þökk (“thanks”), ögn (“a bit, a little”), öld (“century”), önn (“care; business, work”), örk (“sheet of paper; chest”), öxl (“shoulder”); `unumut` is the default for feminine nouns

Declension of gjöf (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	gjöf	gjöfin	gjafir	gjafirnar
accusative	gjöf	gjöfina	gjafir	gjafirnar
dative	gjöf	gjöfinni	gjöfum	gjöfunum
genitive	gjafar	gjafarinnar	gjafa	gjafanna

braut (“way, road”)

Declension of braut (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	braut	brautin	brautir	brautirnar
accusative	braut, brautu¹	brautina, brautuna¹	brautir	brautirnar
dative	braut, brautu²	brautinni, brautunni²	brautum	brautunum
genitive	brautar	brautarinnar	brauta	brautanna

¹Extremely rare.
²Rare.

gjörð (“saddle girth; barrel hoop”)

Declension of gjörð (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	gjörð	gjörðin	gjörðir, gjarðir	gjörðirnar, gjarðirnar
accusative	gjörð	gjörðina	gjörðir, gjarðir	gjörðirnar, gjarðirnar
dative	gjörð	gjörðinni	gjörðum	gjörðunum
genitive	gjörðar, gjarðar	gjörðarinnar, gjarðarinnar	gjörða, gjarða	gjörðanna, gjarðanna

hurð (“door”)

Declension of hurð (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	hurð	hurðin	hurðir¹, hurðar²	hurðirnar¹, hurðarnar²
accusative	hurð	hurðina	hurðir¹, hurðar²	hurðirnar¹, hurðarnar²
dative	hurð	hurðinni	hurðum	hurðunum
genitive	hurðar	hurðarinnar	hurða	hurðanna

¹Traditional.
²Increasingly common.

Kaupmannahöfn (“Copenhagen”)

Declension of Kaupmannahöfn (sg-only feminine)

indefinite singular
nominative	Kaupmannahöfn
accusative	Kaupmannahöfn
dative	Kaupmannahöfn
genitive	Kaupmannahafnar

höll (“castle, palace”)

Declension of höll (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	höll	höllin	hallir	hallirnar
accusative	höll, höllu¹	höllina	hallir	hallirnar
dative	höll, höllu¹	höllinni	höllum	höllunum
genitive	hallar	hallarinnar	halla	hallanna

¹Archaic or literary.

jörð (“earth”); note that alternative ending -u applies in def dat but not def acc

Declension of jörð (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	jörð	jörðin	jarðir	jarðirnar
accusative	jörð, jörðu¹	jörðina	jarðir	jarðirnar
dative	jörð, jörðu¹	jörðinni, jörðunni¹	jörðum	jörðunum
genitive	jarðar	jarðarinnar	jarða	jarðanna

¹In fixed expressions.

laut (“small depression in the ground”)

Declension of laut (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	laut	lautin	lautir	lautirnar
accusative	laut, lautu¹	lautina	lautir	lautirnar
dative	laut, lautu¹	lautinni	lautum	lautunum
genitive	lautar	lautarinnar	lauta	lautanna

¹Archaic or literary.

lest (“train; cargo hold; ton”)

Declension of lest (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	lest	lestin	lestir¹, lestar²	lestirnar¹, lestarnar²
accusative	lest	lestina	lestir¹, lestar²	lestirnar¹, lestarnar²
dative	lest	lestinni	lestum	lestunum
genitive	lestar	lestarinnar	lesta	lestanna

¹Most meanings.
²In the meaning "cargo hold".

mold (“earth, soil”); note ! meaning indefinite only

Declension of mold (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	mold	moldin	moldir	moldirnar
accusative	mold, moldu¹	moldina	moldir	moldirnar
dative	mold, moldu²	moldinni	moldum	moldunum
genitive	moldar	moldarinnar	molda	moldanna

¹Rare; archaic or literary.
²Archaic or literary.

rödd (“voice”)

Declension of rödd (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	rödd	röddin	raddir	raddirnar
accusative	rödd, röddu¹	röddina	raddir	raddirnar
dative	rödd, röddu²	röddinni	röddum	röddunum
genitive	raddar	raddarinnar	radda	raddanna

¹Rare; archaic or literary.
²Archaic or literary.

síld (“herring”)

Declension of síld (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	síld	síldin	síldar¹, síldir²	síldarnar¹, síldirnar²
accusative	síld	síldina	síldar¹, síldir²	síldarnar¹, síldirnar²
dative	síld	síldinni	síldum	síldunum
genitive	síldar	síldarinnar	sílda	síldanna

¹Modern.
²Traditional.

sól (“sun”)

Declension of sól (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	sól	sólin	sólir	sólirnar
accusative	sól, sólu¹	sólina, sóluna²	sólir	sólirnar
dative	sól, sólu¹	sólinni, sólunni²	sólum	sólunum
genitive	sólar	sólarinnar	sóla, sólna	sólanna, sólnanna

¹Literary.
²Rare.

stund (“time, while”); also klukkustund (including with same footnote)

Declension of stund (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	stund	stundin	stundir	stundirnar
accusative	stund	stundina	stundir	stundirnar
dative	stund, stundu¹	stundinni	stundum	stundunum
genitive	stundar	stundarinnar	stunda	stundanna

¹Archaic or literary.

svalir (“balcony; porch”)

Declension of svalir (pl-only feminine)

	plural
	indefinite	definite
nominative	svalir	svalirnar
accusative	svalir	svalirnar
dative	svölum	svölunum
genitive	svala	svalanna

ull (“wool”); also bómull (“cotton”)

Declension of ull (sg-only feminine)

	singular
	indefinite	definite
nominative	ull	ullin
accusative	ull	ullina
dative	ull	ullinni
genitive	ullar	ullarinnar

Venus (“Venus (personal name, goddess, planet)”)

Declension of Venus (sg-only feminine)

indefinite singular
nominative	Venus
accusative	Venus, Venusi
dative	Venus, Venusi
genitive	Venusar

eygló (“eyeball??”); NOTE: acc/dat are eyglóina, eyglóinni NOT with loss of -i-.

Declension of eygló (sg-only feminine)

	singular
	indefinite	definite
nominative	eygló	eyglóin
accusative	eygló	eyglóina
dative	eygló	eyglóinni
genitive	eyglóar	eyglóarinnar

sígó (“cig, cigarette”); NOTE: acc/dat are sígóna/sígóina, sígónni/sígóinni with optional loss of -i-. Def gen sg doesn't exist.

Declension of sígó (sg-only feminine)

	singular
	indefinite	definite
nominative	sígó	sígóin
accusative	sígó	sígóna, sígóina
dative	sígó	sígónni, sígóinni
genitive	sígó	—

föl (“thin covering of snow”); needs '-unumut'

Declension of föl (sg-only feminine)

	singular
	indefinite	definite
nominative	föl	fölin
accusative	föl	fölina
dative	föl	fölinni
genitive	fölar	fölarinnar

plural mostly in -ir, with suffix

athugasemd (“remark”)

Declension of athugasemd (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	athugasemd	athugasemdin	athugasemdir	athugasemdirnar
accusative	athugasemd	athugasemdina	athugasemdir	athugasemdirnar
dative	athugasemd	athugasemdinni	athugasemdum	athugasemdunum
genitive	athugasemdar	athugasemdarinnar	athugasemda	athugasemdanna

friðsemd (“peaceableness”), frjósemd (“fertility, fruitfulness”), mágsemd (“relationship by marriage”)

Declension of frjósemd (sg-only feminine)

	singular
	indefinite	definite
nominative	frjósemd	frjósemdin
accusative	frjósemd	frjósemdina
dative	frjósemd	frjósemdinni
genitive	frjósemdar	frjósemdarinnar

alúð (“cordiality”), ástúð (“amiability, kindness”), léttúð (“levity, frivolity”), samúð (“sympathy”), úlfúð (“enmity”), varúð (“caution”), þverúð (“refractoriness, obstinacy”)

Declension of samúð (sg-only feminine)

	singular
	indefinite	definite
nominative	samúð	samúðin
accusative	samúð	samúðina
dative	samúð	samúðinni
genitive	samúðar	samúðarinnar

tegund (“sort, kind, type”), þúsund (“thousand; (in plural) thousands”)

Declension of tegund (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	tegund	tegundin	tegundir	tegundirnar
accusative	tegund	tegundina	tegundir	tegundirnar
dative	tegund	tegundinni	tegundum	tegundunum
genitive	tegundar	tegundarinnar	tegunda	tegundanna

vitund (“knowledge”)

Declension of vitund (sg-only feminine)

	singular
	indefinite	definite
nominative	vitund	vitundin
accusative	vitund	vitundina
dative	vitund	vitundinni
genitive	vitundar	vitundarinnar

einkunn (“grade, credit (in school); point”)

Declension of einkunn (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	einkunn	einkunnin	einkunnir	einkunnirnar
accusative	einkunn	einkunnina	einkunnir	einkunnirnar
dative	einkunn	einkunninni	einkunnum	einkunnunum
genitive	einkunnar	einkunnarinnar	einkunna	einkunnanna

miskunn (“mercy”), vorkunn (“pity, sympathy”)

Declension of miskunn (sg-only feminine)

	singular
	indefinite	definite
nominative	miskunn	miskunnin
accusative	miskunn	miskunnina
dative	miskunn	miskunninni
genitive	miskunnar	miskunnarinnar

fegurð (“beauty”), lipurð (“suppleness, adroitness”), megurð (“thinness”), vekurð (“amble, ambling (of a horse)”)

Declension of fegurð (sg-only feminine)

	singular
	indefinite	definite
nominative	fegurð	fegurðin
accusative	fegurð	fegurðina
dative	fegurð	fegurðinni
genitive	fegurðar	fegurðarinnar

terms needing unuUmut

NOTE: Per Thomson, "All nouns that end in -un in the nominative singular are feminine and belong to this group." Not sure if I completely believe that, but at least we can make `unuUmut` the default for -un nouns that are feminine. Note that the genitive singular, strangely, maintains the u-mutation (pöntunar rather than #pantanar). Note also that the original u-mutated form, whatever it is, reappears in the dative plural; we should remember and reuse it rather then regenerating it from the un-u-mutated form.
verslun (“trade, business; store, shop”); also betrun (“improvement”), blessun (“blessing”), borgun (“payment”), byrjun (“beginning”), drukknun (“drowning”), frestun (“postponement”), greftrun (“burial, interment”), huggun (“comfort”), hugsun (“thought”), kvittun (“receipt”), litun (“coloring, dyeing”), móðgun (“offense, insult”), náðun (“pardoning, pardon”), ógnun (“threat, menace”), prentun (“printing, impression”), ræktun (“cultivation (of crops, land)”), skemmtun (“enjoyment”), tálmun (“hindrance”), þókknun (“pleasure, liking; fee, compensation”), þvingun (“compulsion”), ætlun (“opinion; intention”) (ætlan is much more common)

Declension of verslun (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	verslun	verslunin	verslanir	verslanirnar
accusative	verslun	verslunina	verslanir	verslanirnar
dative	verslun	versluninni	verslunum	verslununum
genitive	verslunar	verslunarinnar	verslana	verslananna

pöntun (“order (in commerce)”); also ákvörðun (“decision”), fölsun (“falsification”), kvörtun (“complaint”), löngun (“longing”), röskun (“disturbance”), sköpun (“creation”), vöntun (“lack”)

Declension of pöntun (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	pöntun	pöntunin	pantanir	pantanirnar
accusative	pöntun	pöntunina	pantanir	pantanirnar
dative	pöntun	pöntuninni	pöntunum	pöntununum
genitive	pöntunar	pöntunarinnar	pantana	pantananna

efun (“doubt”), hjúkrun (“nursing”), iðrun (“repentance”), mengun (“pollution”), minnkun (“decrease; shame, disgrace”), veiklun (“weakening, debilitation”), þróun (“development”)

Declension of efun (sg-only feminine)

	singular
	indefinite	definite
nominative	efun	efunin
accusative	efun	efunina
dative	efun	efuninni
genitive	efunar	efunarinnar

bötun (“improvement”), dögun (“dawn”), glötun (“loss; spoilage”), hrösun (“stumbling; sinning, sin”), mölun (“grinding”), plöntun (“planting”), tilhlökkun (“looking forward, anticipation”), töpun (“loss”), þjökun (“oppression”), öflun (“procuring, acquisition”)

Declension of bötun (sg-only feminine)

	singular
	indefinite	definite
nominative	bötun	bötunin
accusative	bötun	bötunina
dative	bötun	bötuninni
genitive	bötunar	bötunarinnar

terms needing unUmut

In örvun and fjölgun (among others), the un-u-mutation of ö does not occur, but u still -> a, hence pl örvanir, fjölganir.
örvun (“encouragement; stimulation”), fjölgun (“increase, proliferation”)

Declension of örvun (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	örvun	örvunin	örvanir	örvanirnar
accusative	örvun	örvunina	örvanir	örvanirnar
dative	örvun	örvuninni	örvunum	örvununum
genitive	örvunar	örvunarinnar	örvana	örvananna

terms needing umut

dragt (“skirt suit”), aukavakt (“extra shift”), ...

Declension of aukavakt (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	aukavakt	aukavaktin	aukavaktir	aukavaktirnar
accusative	aukavakt	aukavaktina	aukavaktir	aukavaktirnar
dative	aukavakt	aukavaktinni	aukavöktum	aukavöktunum
genitive	aukavaktar	aukavaktarinnar	aukavakta	aukavaktanna

terms needing uUmut

ætlan (“opinion; intention”), alúðarheilsan, ...

Declension of ætlan (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	ætlan	ætlanin	ætlanir	ætlanirnar
accusative	ætlan	ætlanina	ætlanir	ætlanirnar
dative	ætlan	ætlaninni	ætlunum	ætlununum
genitive	ætlanar	ætlanarinnar	ætlana	ætlananna

, ...

root ending in long vowel

ending in -á

á (“river”); gen in -r, nom pl in -r, dat pl in -m, gen pl in -a but drops in the definite; also brá (“eyelash; eyelid; greasy film on water”), flá (“float on net”), gjá (“gorge, canyon”), gljá (“glitter, brilliancy”), lá (“sea near the shore; film on water”), sjá (“device for seeing; seeing”) (eggsjá (“device for X-ray examination of eggs”), ísjá (“attention”), litsjá (“spectroscope”), ratsjá (“radar”), rúmsjá (“stereoscope”), skuggsjá (“mirror”), smásjá (“microscope”), viðsjá (“caution, wariness; (plural) quarrels”), víðsjá (“wide view; survey”)), slá (“bolt (on door)”), spá (“prophecy; sleeveless coat”) (also neuter in the meaning "sleeveless coat"), þrá (“longing”)

Declension of á (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	á	áin	ár	árnar
accusative	á	ána	ár	árnar
dative	á	ánni	ám	ánum
genitive	ár	árinnar	áa	ánna

andrá (“instant”); gen in -r; also gá (“barking; attention”) (goðgá (“blasphemy”), hundgá (“barking of dogs”)), ljá (“newmown hay”), líkþrá (“leprosy”), ásjá (“assistance”), forsjá (“foresight”), tilsjá (“supervision; hope of help”),

Declension of andrá (sg-only feminine)

	singular
	indefinite	definite
nominative	andrá	andráin
accusative	andrá	andrána
dative	andrá	andránni
genitive	andrár	andrárinnar

Andrá (organization name); gen in -r or -ar; singular by default

Declension of Andrá (sg-only feminine)

indefinite singular
nominative	Andrá
accusative	Andrá
dative	Andrá
genitive	Andrár, Andráar

blá (“marsh”); gen in -ar, nom pl in -r

Declension of blá (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	blá	bláin	blár	blárnar
accusative	blá	blána	blár	blárnar
dative	blá	blánni	blám	blánum
genitive	bláar	bláarinnar	bláa	blánna

há (“horse skin; aftergrass”); gen in -r/ar, nom pl in -r; also krá (“saloon, bar; nook”), rá (“roe deer”), skrá (“catalog, list; lock”)

Declension of há (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	há	háin	hár	hárnar
accusative	há	hána	hár	hárnar
dative	há	hánni	hám	hánum
genitive	hár, háar	hárinnar, háarinnar	háa	hánna

þinghá (“administrative district”); gen in -r/ar; also ná (“goddess (poetic)”); also gná (“goddess (poetic)”)? (not in BÍN)

Declension of þinghá (sg-only feminine)

	singular
	indefinite	definite
nominative	þinghá	þingháin
accusative	þinghá	þinghána
dative	þinghá	þinghánni
genitive	þinghár, þingháar	þinghárinnar, þingháarinnar

rá (“sailyard”)

Declension of rá (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	rá	ráin	rár, rær	rárnar, rærnar
accusative	rá	rána	rár, rær	rárnar, rærnar
dative	rá	ránni	rám	ránum
genitive	rár, ráar	rárinnar, ráarinnar	ráa	ránna

tá (“toe”) (declined like words in -ó)

Declension of tá (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	tá	táin	tær	tærnar
accusative	tá	tána	tær	tærnar
dative	tá	tánni	tám	tánum
genitive	táar	táarinnar	táa	tánna

ending in -ó

fló (“flea”); gen in -ar, nom pl in -r with umlaut, dat pl in -m, gen pl in -a but drops in the definite; also kló (“claw”), kónguló (“spider”), könguló (“spider”), köngulló (“spider”) (proscribed), köngurló (“spider”) (proscribed), ló (“pile, nap; wool waste”), ró (“washer; nut”)

Declension of fló (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	fló	flóin	flær	flærnar
accusative	fló	flóna	flær	flærnar
dative	fló	flónni	flóm	flónum
genitive	flóar	flóarinnar	flóa	flónna

fró (“relief, comfort”), ró (“quiet, tranquility”)

Declension of fró (sg-only feminine)

	singular
	indefinite	definite
nominative	fró	fróin
accusative	fró	fróna
dative	fró	frónni
genitive	fróar	fróarinnar

kró (“corner, nook”)

Declension of kró (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	kró	króin	krær, krór	krærnar, krórnar
accusative	kró	króna	krær, krór	krærnar, krórnar
dative	kró	krónni	króm	krónum
genitive	króar	króarinnar	króa	krónna

sló (“bony core of a horn”); NOTE: dative plural; indef slóum, def slónum

Declension of sló (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	sló	slóin	slór, slóar, slær	slórnar, slóarnar, slærnar
accusative	sló	slóna	slór, slóar, slær	slórnar, slóarnar, slærnar
dative	sló	slónni	slóum	slónum
genitive	slór, slóar	slórinnar, slóarinnar	slóa	slónna

tó (“lawn”)

Declension of tó (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	tó	tóin	tór, tær	tórnar, tærnar
accusative	tó	tóna	tór, tær	tórnar, tærnar
dative	tó	tónni	tóm	tónum
genitive	tór, tóar	tórinnar, tóarinnar	tóa	tónna

þró (“trough, tank”); NOTE: dative plural; indef þróm/þróum, def þrónum

Declension of þró (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	þró	þróin	þrær, þrór	þrærnar, þrórnar
accusative	þró	þróna	þrær, þrór	þrærnar, þrórnar
dative	þró	þrónni	þróm, þróum	þrónum
genitive	þróar, þrór	þróarinnar, þrórinnar	þróa	þrónna

stó (“hearth, fireplace”) (eldstó (“cooking stove”))

Declension of stó (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	stó	stóin	stór, stóar	stórnar, stóarnar
accusative	stó	stóna	stór, stóar	stórnar, stóarnar
dative	stó	stónni	stóm	stónum
genitive	stór, stóar	stórinnar, stóarinnar	stóa	stónna

ending in -ú

frú (“married woman”); gen in -ar, nom pl in -r, dat pl in -m, gen pl in -a but drops in the definite (also húsfrú (“housewife”), piparjómfrú (“spinster”), ungfrú (“unmarried woman”), trú (“faith, belief”))

Declension of frú (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	frú	frúin	frúr	frúrnar
accusative	frú	frúna	frúr	frúrnar
dative	frú	frúnni	frúm	frúnum
genitive	frúar	frúarinnar	frúa	frúnna

jómfrú (“virgin, maiden”)

Declension of jómfrú (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	jómfrú	jómfrúin	jómfrúr	jómfrúrnar
accusative	jómfrú	jómfrúna	jómfrúr	jómfrúrnar
dative	jómfrú	jómfrúnni	jómfrúm	jómfrúnum
genitive	jómfrúar, jómfrúr¹	jómfrúarinnar, jómfrúrinnar¹	jómfrúa	jómfrúnna

¹Dated.

brú (“bridge”)

Declension of brú (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	brú	brúin	brýr	brýrnar
accusative	brú	brúna	brýr	brýrnar
dative	brú	brúnni	brúm	brúnum
genitive	brúar	brúarinnar	brúa	brúnna

irregular/misc

mær (“maid”), mey (“maid”); NOTE: def nom/acc/dat meyin, meyna, meynni

Declension of mær (feminine irreg-stem)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	mær	mærin	meyjar	meyjarnar
accusative	mey	meyna	meyjar	meyjarnar
dative	meyju, mey	meyjunni, meynni	meyjum	meyjunum
genitive	meyjar	meyjarinnar	meyja	meyjanna

Declension of mey (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	mey	meyin	meyjar	meyjarnar
accusative	mey	meyna	meyjar	meyjarnar
dative	meyju, mey	meyjunni, meynni	meyjum	meyjunum
genitive	meyjar	meyjarinnar	meyja	meyjanna

fjöður (“feather”); NOTE: unumut is the default and contraction should apply first; # is needed because fjöður- not fjöð- is the stem.

Declension of fjöður (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	fjöður	fjöðrin	fjaðrir	fjaðrirnar
accusative	fjöður	fjöðrina	fjaðrir	fjaðrirnar
dative	fjöður	fjöðrinni	fjöðrum	fjöðrunum
genitive	fjaðrar	fjaðrarinnar	fjaðra	fjaðranna

alin (“ell”); `vstem` overrides the vowel stem i.e. the stem before endings beginning with a vowel; same stem that's affected by contraction.

Declension of alin (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	alin	alinin	álnir	álnirnar
accusative	alin	alinina	álnir	álnirnar
dative	alin	alininni	álnum	álnunum
genitive	álnar	álnarinnar	álna	álnanna

öxi (“axe”), öx (“axe”), exi (“axe”)

Declension of öx (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	öx	öxin	axir	axirnar
accusative	öx	öxina	axir	axirnar
dative	öx	öxinni	öxum	öxunum
genitive	axar, öxar	axarinnar, öxarinnar	axa	axanna

`unumut` isn't the default for feminines in -i/-a (e.g. we don't want to un-u-mutate tölva).

Declension of öxi (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	öxi	öxin	axir	axirnar
accusative	öxi	öxina	axir	axirnar
dative	öxi	öxinni	öxum	öxunum
genitive	axar, öxar	axarinnar, öxarinnar	axa	axanna

For `exi`, easiest is to set the gen sg and plstem directly. (Feminines in -i by default have -i in the entire singular.)

Declension of exi (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	exi	exin	axir	axirnar
accusative	exi	exina	axir	axirnar
dative	exi	exinni	öxum	öxunum
genitive	axar	axarinnar	axa	axanna

kýr (“cow”), gen ^r, nom pl ^r, dat pl -m, gen pl in -a but drops in the definite; also sýr (“sow (archaic)”), ær (“ewe”). NOTE: for `unimut`, the non-i-mutated forms are the acc/dat sg and dat/gen pl. See also hættur, mætur.

Declension of kýr (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	kýr	kýrin	kýr	kýrnar
accusative	kú	kúna	kýr	kýrnar
dative	kú	kúnni	kúm	kúnum
genitive	kýr	kýrinnar	kúa	kúnna

Declension of ær (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	ær	ærin	ær	ærnar
accusative	á	ána	ær	ærnar
dative	á	ánni	ám	ánum
genitive	ær	ærinnar	áa	ánna

Declension of barnatær (pl-only feminine)

	plural
	indefinite	definite
nominative	barnatær	barnatærnar
accusative	barnatær	barnatærnar
dative	barnatám	barnatánum
genitive	barnatáa	barnatánna

mús (“mouse”); also lús (“louse”)

Declension of mús (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	mús	músin	mýs	mýsnar
accusative	mús	músina	mýs	mýsnar
dative	mús	músinni	músum	músunum
genitive	músar	músarinnar	músa	músanna

dyr (“door(way)”)

Declension of dyr (pl-only feminine irreg-stem)

	plural
	indefinite	definite
nominative	dyr	dyrnar
accusative	dyr	dyrnar
dative	dyrum	dyrunum
genitive	dyra	dyranna

brún (“eyebrow; rim, edge”)

Declension of brún (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	brún	brúnin	brúnir¹, brýn², brýr³	brúnirnar¹, brýnnar⁴, brýrnar³
accusative	brún	brúnina	brúnir¹, brýn², brýr³	brúnirnar¹, brýnnar⁴, brýrnar³
dative	brún	brúninni	brúnum	brúnunum
genitive	brúnar	brúnarinnar	brúna	brúnanna

¹All meanings.
²In fixed expressions.
³Colloquial, in the meaning "eyebrow".
⁴Literary, in the meaning "eyebrow".

augabrún (“eyebrow”); also augnabrún (“eyebrow”)

Declension of augabrún (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	augabrún	augabrúnin	augabrúnir, augabrýr¹	augabrúnirnar, augabrýnnar, augabrýrnar¹
accusative	augabrún	augabrúnina	augabrúnir, augabrýr¹	augabrúnirnar, augabrýnnar, augabrýrnar¹
dative	augabrún	augabrúninni	augabrúnum	augabrúnunum
genitive	augabrúnar	augabrúnarinnar	augabrúna	augabrúnanna

¹Especially colloquial.

systradætur (“nieces?”)

Declension of systradætur (pl-only feminine)

	plural
	indefinite	definite
nominative	systradætur	systradæturnar
accusative	systradætur	systradæturnar
dative	systradætrum	systradætrunum
genitive	systradætra	systradætranna

gleym-mér-ei (“forget-me-not”)

Declension of gleym-mér-ei (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	gleym-mér-ei	gleym-mér-eiin	gleym-mér-eiar	gleym-mér-eiarnar
accusative	gleym-mér-ei	gleym-mér-eina	gleym-mér-eiar	gleym-mér-eiarnar
dative	gleym-mér-ei	gleym-mér-einni	gleym-mér-eium	gleym-mér-eiunum
genitive	gleym-mér-eiar	gleym-mér-eiarinnar	gleym-mér-eia	gleym-mér-eianna

kröggur (“trouble, difficulty”)

Declension of kröggur (pl-only feminine)

	plural
	indefinite	definite
nominative	kröggur	kröggurnar
accusative	kröggur	kröggurnar
dative	kröggum	kröggunum
genitive	—	—

miskabætur (“amends, compensation for personal injury”)

Declension of miskabætur (pl-only feminine)

	plural
	indefinite	definite
nominative	miskabætur	miskabæturnar
accusative	miskabætur	miskabæturnar
dative	miskabótum	miskabótunum
genitive	miskabóta	miskabótanna

lífstíð (“lifetime”) (mostly in set phrases)

Declension of lífstíð (sg-only feminine)

indefinite singular
nominative	lífstíð
accusative	lífstíð
dative	lífstíð
genitive	lífstíðar

female personal names

in -borg

Cf. [1]
female personal names in -borg: Elínborg, Finnborg, Herborg, Sólborg, Svanborg, Valborg, Vilborg

Declension of Elínborg (sg-only feminine)

indefinite singular
nominative	Elínborg
accusative	Elínborgu
dative	Elínborgu
genitive	Elínborgar

Declension of Elínborg (sg-only feminine)

indefinite singular
nominative	Elínborg
accusative	Elínborgu
dative	Elínborgu
genitive	Elínborgar

Declension of Elínborg (sg-only feminine)

indefinite singular
nominative	Elínborg
accusative	Elínborg
dative	Elínborg
genitive	Elínborgar

in -ín

female personal names in -ín: Elín, Katrín, Kristín

Declension of Elín (sg-only feminine)

indefinite singular
nominative	Elín
accusative	Elínu
dative	Elínu
genitive	Elínar

Declension of Elín (sg-only feminine)

indefinite singular
nominative	Elín
accusative	Elínu
dative	Elínu
genitive	Elínar

Declension of Sigurlín (sg-only feminine)

indefinite singular
nominative	Sigurlín
accusative	Sigurlín
dative	Sigurlín
genitive	Sigurlínar

Declension of Kristín (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	Kristín	Kristínin	Kristínar	Kristínarnar
accusative	Kristínu	Kristínuna	Kristínar	Kristínarnar
dative	Kristínu	Kristínunni	Kristínum	Kristínunum
genitive	Kristínar	Kristínarinnar	Kristína	Kristínanna

Declension of Kristín (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	Kristín	Kristínin	Kristínar	Kristínarnar
accusative	Kristínu	Kristínuna	Kristínar	Kristínarnar
dative	Kristínu	Kristínunni	Kristínum	Kristínunum
genitive	Kristínar	Kristínarinnar	Kristína	Kristínanna

in -laug

female personal names in -laug: Áslaug, Droplaug, Geirlaug, Guðlaug, Sigurlaug, Snjólaug, Svanlaug

Declension of Áslaug (sg-only feminine)

indefinite singular
nominative	Áslaug
accusative	Áslaugu
dative	Áslaugu
genitive	Áslaugar

Declension of Áslaug (sg-only feminine)

indefinite singular
nominative	Áslaug
accusative	Áslaugu
dative	Áslaugu
genitive	Áslaugar

in -leif

female personal names in -leif: Dýrleif, Guðleif, Ingileif

Declension of Dýrleif (sg-only feminine)

indefinite singular
nominative	Dýrleif
accusative	Dýrleif, Dýrleifu
dative	Dýrleif, Dýrleifu
genitive	Dýrleifar

Declension of Dýrleif (sg-only feminine)

indefinite singular
nominative	Dýrleif
accusative	Dýrleif, Dýrleifu
dative	Dýrleif, Dýrleifu
genitive	Dýrleifar

in -ljót

female personal names in -ljót: Bergljót

Declension of Bergljót (sg-only feminine)

indefinite singular
nominative	Bergljót
accusative	Bergljótu
dative	Bergljótu
genitive	Bergljótar

Declension of Bergljót (sg-only feminine)

indefinite singular
nominative	Bergljót
accusative	Bergljótu
dative	Bergljótu
genitive	Bergljótar

in -rún

female personal names in -rún: Eyrún, Heiðrún, Kolbrún, Kristrún, Sólrún

Declension of Eyrún (sg-only feminine)

indefinite singular
nominative	Eyrún
accusative	Eyrúnu
dative	Eyrúnu
genitive	Eyrúnar

Declension of Eyrún (sg-only feminine)

indefinite singular
nominative	Eyrún
accusative	Eyrúnu
dative	Eyrúnu
genitive	Eyrúnar

Declension of Eyrún (sg-only feminine)

indefinite singular
nominative	Eyrún
accusative	Eyrún
dative	Eyrún
genitive	Eyrúnar

Guðrún (female given name); also Kolbrún, Sigrún

Declension of Guðrún (sg-only feminine)

indefinite singular
nominative	Guðrún
accusative	Guðrúnu, Guðrúni¹
dative	Guðrúnu, Guðrúni¹
genitive	Guðrúnar

¹Rare.

in -veig

female personal names in -veig: Ástveig, Bjarnveig, Brynveig, Eyveig, Guðveig, Hallveig, Heiðveig, Kristveig, Rannveig, Sigurveig, Solveig, Sólveig

Declension of Ástveig (sg-only feminine)

indefinite singular
nominative	Ástveig
accusative	Ástveigu
dative	Ástveigu
genitive	Ástveigar

Declension of Ástveig (sg-only feminine)

indefinite singular
nominative	Ástveig
accusative	Ástveigu
dative	Ástveigu
genitive	Ástveigar

Declension of Hallveig (sg-only feminine)

indefinite singular
nominative	Hallveig
accusative	Hallveig
dative	Hallveig
genitive	Hallveigar

in -ný

female personal names in -ný: Dagný, Árný, Bergný, Eirný, Friðný, Geirný, Guðný, Hroðný, Lyngný, Oddný, Signý, Véný, Þórný

Declension of Dagný (sg-only feminine)

indefinite singular
nominative	Dagný
accusative	Dagnýju
dative	Dagnýju
genitive	Dagnýjar

Declension of Dagný (sg-only feminine)

indefinite singular
nominative	Dagný
accusative	Dagnýju
dative	Dagnýju
genitive	Dagnýjar

Declension of Dagný (sg-only feminine)

indefinite singular
nominative	Dagný
accusative	Dagný
dative	Dagný
genitive	Dagnýjar

uncompounded female personal names in -ný: Anný, Benný, Henný, Magný, also Marsý

Declension of Anný (sg-only feminine)

indefinite singular
nominative	Anný
accusative	Anný
dative	Anný
genitive	Annýjar

in -ey (not -mey)

female personal names in -ey (not -mey): Bjargey, Bjarney, Bjartey, Fanney, Laufey, Líney, Sóley, Steiney, Þórey

Declension of Sóley (sg-only feminine)

indefinite singular
nominative	Sóley
accusative	Sóleyju
dative	Sóleyju
genitive	Sóleyjar

Declension of Sóley (sg-only feminine)

indefinite singular
nominative	Sóley
accusative	Sóleyju
dative	Sóleyju
genitive	Sóleyjar

Declension of Sóley (sg-only feminine)

indefinite singular
nominative	Sóley
accusative	Sóley
dative	Sóley
genitive	Sóleyjar

in -mey

female personal names in -mey: Friðmey

Declension of Friðmey (sg-only feminine)

indefinite singular
nominative	Friðmey
accusative	Friðmey, Friðmeyju
dative	Friðmey, Friðmeyju
genitive	Friðmeyjar

Declension of Friðmey (sg-only feminine)

indefinite singular
nominative	Friðmey
accusative	Friðmey, Friðmeyju
dative	Friðmey, Friðmeyju
genitive	Friðmeyjar

in -björg

female personal names in -björg: Björg, Arnbjörg, Ástbjörg, Auðbjörg, Eybjörg, Finnbjörg, Guðbjörg, Hallbjörg, Ingibjörg, Kristbjörg, Sigurbjörg, Sveinbjörg, Þorbjörg

Declension of Björg (sg-only feminine)

indefinite singular
nominative	Björg
accusative	Björgu
dative	Björgu
genitive	Bjargar

Declension of Björg (sg-only feminine)

indefinite singular
nominative	Björg
accusative	Björgu
dative	Björgu
genitive	Bjargar

Declension of Ingibjörg (sg-only feminine)

indefinite singular
nominative	Ingibjörg
accusative	Ingibjörgu
dative	Ingibjörgu
genitive	Ingibjargar

Declension of Fingurbjörg (sg-only feminine)

indefinite singular
nominative	Fingurbjörg
accusative	Fingurbjörg
dative	Fingurbjörg
genitive	Fingurbjargar

in -vör

female personal names in -vör: Eyvör, Gunnvör, Hervör, Steinvör

Declension of Eyvör (sg-only feminine)

indefinite singular
nominative	Eyvör
accusative	Eyvöru
dative	Eyvöru
genitive	Eyvarar

Declension of Eyvör (sg-only feminine)

indefinite singular
nominative	Eyvör
accusative	Eyvöru
dative	Eyvöru
genitive	Eyvarar

Declension of Eyvör (sg-only feminine)

indefinite singular
nominative	Eyvör
accusative	Eyvör
dative	Eyvör
genitive	Eyvarar

in -dís

female personal names in -dís: Þórdís, Aldís, Árdís, Ásdís, Bryndís, Eydís, Freydís, Halldís, Herdís, Jódís, Svandís, Valdís, Védís, Vigdís

Declension of Þórdís (sg-only feminine)

indefinite singular
nominative	Þórdís
accusative	Þórdísi
dative	Þórdísi
genitive	Þórdísar

Declension of Þórdís (sg-only feminine)

indefinite singular
nominative	Þórdís
accusative	Þórdísi
dative	Þórdísi
genitive	Þórdísar

in -ur

female personal names in -ur: Auður, Heiður, Ingveldur, Móeiður, Þórelfur, -frídur (Gunnfríður, Hólmfríður, Málfríður, Sigfríður), Gerður (Hallgerður, Ingigerður, Þorgerður), Gunnur (Arngunnur, Hildigunnur), Heiður (Aðalheiður, Arnheiður, Brynheiður, Ragnheiður), Hildur (Ásthildur, Berghildur, Brynhildur, Geirhildur, Gunnhildur, Ragnhildur, Þórhildur), Ástríður (related names Guðríður, Sigríður, Þuríður), Þrúður [also a man's name] (Jarþrúður, Jarðþrúður, Sigþrúður)

Declension of Auður (sg-only feminine)

indefinite singular
nominative	Auður
accusative	Auði
dative	Auði
genitive	Auðar

in -unn

female personal names in -unn: Þórunn, Dýrunn, Iðunn, Ingunn, Jórunn, Steinunn, Sæunn

Declension of Þórunn (sg-only feminine)

indefinite singular
nominative	Þórunn
accusative	Þórunni
dative	Þórunni
genitive	Þórunnar

Declension of Þórunn (sg-only feminine)

indefinite singular
nominative	Þórunn
accusative	Þórunni
dative	Þórunni
genitive	Þórunnar

misc female personal names

not needing un-u-mutation, no acc/dat ending: Eygló, Hlín, Ósk

Declension of Eygló (sg-only feminine)

indefinite singular
nominative	Eygló
accusative	Eygló
dative	Eygló
genitive	Eyglóar

not needing un-u-mutation, optional -i in acc/dat: Svanhvít

Declension of Svanhvít (sg-only feminine)

indefinite singular
nominative	Svanhvít
accusative	Svanhvíti, Svanhvít
dative	Svanhvíti, Svanhvít
genitive	Svanhvítar

not needing un-u-mutation, -i in acc/dat: Ýr

Declension of Ýr (sg-only feminine)

indefinite singular
nominative	Ýr
accusative	Ýri
dative	Ýri
genitive	Ýrar

needing un-u-mutation, no acc/dat ending: Björk, Dröfn, ~~Gjöll~~ (not in BÍN as name), Hlökk, Hrönn, Sjöfn, ~~Þökk~~ (not in BÍN as name), Ögn; `unumut` is the default

Declension of Björk (sg-only feminine)

indefinite singular
nominative	Björk
accusative	Björk
dative	Björk
genitive	Bjarkar

needing un-u-mutation, optional -u in acc/dat: Björt

Declension of Björt (sg-only feminine)

indefinite singular
nominative	Björt
accusative	Björt, Björtu
dative	Björt, Björtu
genitive	Bjartar

needing un-u-mutation, -u in acc/dat: Dagbjört, Guðbjört, Heiðbjört, Ólöf

Declension of Dagbjört (sg-only feminine)

indefinite singular
nominative	Dagbjört
accusative	Dagbjörtu
dative	Dagbjörtu
genitive	Dagbjartar

Elísabet (female given name)

Declension of Elísabet (sg-only feminine)

indefinite singular
nominative	Elísabet
accusative	Elísabetu
dative	Elísabetu
genitive	Elísabetar

Margrét (female given name)

Declension of Margrét (sg-only feminine)

indefinite singular
nominative	Margrét
accusative	Margréti, Margrétu
dative	Margréti, Margrétu
genitive	Margrétar

two-part words

Annamaría (female given name)

Declension of Annamaría (sg-only feminine)

indefinite singular
nominative	Annamaría
accusative	Önnumaríu
dative	Önnumaríu
genitive	Önnumaríu

langafasta (“Lent”)

Declension of langafasta (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	langafasta	langafastan	lönguföstur	löngufösturnar
accusative	lönguföstu	lönguföstuna	lönguföstur	löngufösturnar
dative	lönguföstu	lönguföstunni	lönguföstum	lönguföstunum
genitive	lönguföstu	lönguföstunnar	löngufastna, löngufasta	löngufastnanna, löngufastanna

langavitleysa (“War (card game)”)

Declension of langavitleysa (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	langavitleysa	langavitleysan	lönguvitleysur	lönguvitleysurnar
accusative	lönguvitleysu	lönguvitleysuna	lönguvitleysur	lönguvitleysurnar
dative	lönguvitleysu	lönguvitleysunni	lönguvitleysum	lönguvitleysunum
genitive	lönguvitleysu	lönguvitleysunnar	lönguvitleysna	lönguvitleysnanna

Langatröð (proper noun); similarly Langastétt (company noun)

Declension of Langatröð (sg-only feminine)

indefinite singular
nominative	Langatröð
accusative	Löngutröð
dative	Löngutröð
genitive	Löngutraðar

Langasáta (place name); also Langalína (place name), Langabrekka (place name)

Declension of Langasáta (sg-only feminine)

indefinite singular
nominative	Langasáta
accusative	Löngusátu
dative	Löngusátu
genitive	Löngusátu

Langafjara (place name); oblique cases are Löngufjöru; also Langaflaga (place name)

Declension of Langafjara (sg-only feminine)

indefinite singular
nominative	Langafjara
accusative	Löngufjöru
dative	Löngufjöru
genitive	Löngufjöru

Langahlíð (company name, place name)

Declension of Langahlíð (sg-only feminine)

indefinite singular
nominative	Langahlíð
accusative	Lönguhlíð
dative	Lönguhlíð
genitive	Lönguhlíðar

Langafit (place name)

Declension of Langafit (sg-only feminine)

indefinite singular
nominative	Langafit
accusative	Löngufit
dative	Löngufit
genitive	Löngufitjar

Langa-Rauðka (place name)

Declension of Langa-Rauðka (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	Langa-Rauðka	Langa-Rauðkan	Löngu-Rauðkur	Löngu-Rauðkurnar
accusative	Löngu-Rauðku	Löngu-Rauðkuna	Löngu-Rauðkur	Löngu-Rauðkurnar
dative	Löngu-Rauðku	Löngu-Rauðkunni	Löngu-Rauðkum	Löngu-Rauðkunum
genitive	Löngu-Rauðku	Löngu-Rauðkunnar	Löngu-Rauðka	Löngu-Rauðkanna

Langamýri (town name)

Declension of Langamýri (sg-only feminine)

indefinite singular
nominative	Langamýri
accusative	Löngumýri
dative	Löngumýri
genitive	Löngumýrar

langavakt (“long shift?”)

Declension of langavakt (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	langavakt	langavaktin	lönguvaktir	lönguvaktirnar
accusative	lönguvakt	lönguvaktina	lönguvaktir	lönguvaktirnar
dative	lönguvakt	lönguvaktinni	lönguvöktum	lönguvöktunum
genitive	lönguvaktar	lönguvaktarinnar	lönguvakta	lönguvaktanna

langatöng (“middle finger”)

Declension of langatöng (feminine)

	singular		plural
	indefinite	definite	indefinite	definite
nominative	langatöng	langatöngin	löngutengur, löngutangir	löngutengurnar, löngutangirnar
accusative	löngutöng	löngutöngina	löngutengur, löngutangir	löngutengurnar, löngutangirnar
dative	löngutöng	löngutönginni	löngutöngum	löngutöngunum
genitive	löngutangar	löngutangarinnar	löngutanga	löngutanganna

NOTE: Adjective langaftastur has e.g. dat sg strong langöftustum and weak pl langöftustu.
Brattatorfa (place name)

Declension of Brattatorfa (sg-only feminine)

indefinite singular
nominative	Brattatorfa
accusative	Bröttutorfu
dative	Bröttutorfu
genitive	Bröttutorfu

Brattagata (place name) (oblique forms Bröttugöttu)

Declension of Brattagata (sg-only feminine)

indefinite singular
nominative	Brattagata
accusative	Bröttugötu
dative	Bröttugötu
genitive	Bröttugötu

Brattabrekka (place name)

Declension of Brattabrekka (sg-only feminine)

indefinite singular
nominative	Brattabrekka
accusative	Bröttubrekku, Brattabrekku¹
dative	Bröttubrekku, Brattabrekku¹
genitive	Bröttubrekku, Brattabrekku¹

¹In older stories.

Brattatunga (place name, company name)

Declension of Brattatunga (sg-only feminine)

indefinite singular
nominative	Brattatunga
accusative	Bröttutungu, Brattatungu¹
dative	Bröttutungu, Brattatungu¹
genitive	Bröttutungu, Brattatungu¹

¹Rare.

Brattakinn (place name)

Declension of Brattakinn (sg-only feminine)

indefinite singular
nominative	Brattakinn
accusative	Bröttukinn
dative	Bröttukinn
genitive	Bröttukinnar

definite-only

Meyjan (“Virgo”)

Declension of Meyjan (sg-only feminine)

definite singular
nominative	Meyjan
accusative	Meyjuna
dative	Meyjunni
genitive	Meyjunnar

Vogin (“Libra”); also Steingeitin (“Capricorn”)

Declension of Vogin (sg-only feminine)

definite singular
nominative	Vogin
accusative	Vogina
dative	Voginni
genitive	Vogarinnar

Sameinuðu þjóðirnar (“the United Nations”)

Declension of Sameinuðu þjóðirnar (pl-only feminine)

definite plural
nominative	Sameinuðu þjóðirnar
accusative	Sameinuðu þjóðirnar
dative	Sameinuðu þjóðunum
genitive	Sameinuðu þjóðanna

síðari heimsstyrjöldin (“the Second World War”)

Declension of síðari heimsstyrjöldin (sg-only feminine)

definite singular
nominative	síðari heimsstyrjöldin
accusative	síðari heimsstyrjöldina
dative	síðari heimsstyrjöldinni
genitive	síðari heimsstyrjaldarinnar

Sundhnúkagígaröðin (volcano in Iceland)

Declension of Sundhnúkagígaröðin (sg-only feminine)

definite singular
nominative	Sundhnúkagígaröðin
accusative	Sundhnúkagígaröðina
dative	Sundhnúkagígaröðinni
genitive	Sundhnúkagígaraðarinnar

samfellutilgátan (“the continuum hypothesis”)

Declension of samfellutilgátan (sg-only feminine)

definite singular
nominative	samfellutilgátan
accusative	samfellutilgátuna
dative	samfellutilgátunni
genitive	samfellutilgátunnar