Denisc

Old English

Dene (“the Danes”) +‎ -isċ (“-ish”)

Denisċ

Danish, Norse
(substantive) a Dane or Norseman
- The Anglo-Saxon Chronicle
  An. DCCLXXXVII Hēr nam Byrhtrīc cing Offan dohtor Ēadburge. ⁊ on his dagum cōman ǣrest III sċipa Norðmanna, ⁊ þā sē ġerēfa þǣr tō rād, ⁊ hīe wolde drīfan tō þǣs cinges tūne... Þæt wǣron þā ǣrestan sċipu Denisċra manna þe Angelcynnes land ġesōhte.
  Year 787 In this King Brightric kidnapped Offa's daughter Eadburg. And in those days came the first three Norse ships, intending to drive off the reeve and raid the king's town...Those were the first Danish ships to come to the land of the Angles.

Declension of Denisċ — Strong

Singular	Masculine	Feminine	Neuter
Nominative	Denisċ	Denisċ	Denisċ
Accusative	Denisċne	Denisċe	Denisċ
Genitive	Denisċes	Denisċre	Denisċes
Dative	Denisċum	Denisċre	Denisċum
Instrumental	Denisċe	Denisċre	Denisċe
Plural	Masculine	Feminine	Neuter
Nominative	Denisċe	Denisċa, Denisċe	Denisċ
Accusative	Denisċe	Denisċa, Denisċe	Denisċ
Genitive	Denisċra	Denisċra	Denisċra
Dative	Denisċum	Denisċum	Denisċum
Instrumental	Denisċum	Denisċum	Denisċum

Declension of Denisċ — Weak

Singular	Masculine	Feminine	Neuter
Nominative	Denisċa	Denisċe	Denisċe
Accusative	Denisċan	Denisċan	Denisċe
Genitive	Denisċan	Denisċan	Denisċan
Dative	Denisċan	Denisċan	Denisċan
Instrumental	Denisċan	Denisċan	Denisċan
Plural	Masculine	Feminine	Neuter
Nominative	Denisċan	Denisċan	Denisċan
Accusative	Denisċan	Denisċan	Denisċan
Genitive	Denisċra, Denisċena	Denisċra, Denisċena	Denisċra, Denisċena
Dative	Denisċum	Denisċum	Denisċum
Instrumental	Denisċum	Denisċum	Denisċum