From Wiktionary, the free dictionary
ochtar
From Old Irish ochtar .
ochtar m (genitive singular ochtair , nominative plural ochtair ) ( triggers no mutation )
a group of eight people
Tá ochtar daltaí sa rang. There are eight pupils in the class.
Generally used with the genitive plural when referring to human beings; also sometimes used with other nouns, especially if the things they denote are being personified.
ocht ( “ eight ” ) ( non-personal )
Note: Certain mutated forms of some words can never occur in standard Modern Irish. All possible mutated forms are displayed for convenience.
Ó Dónaill, Niall (1977 ) “ochtar ”, in Foclóir Gaeilge–Béarla , Dublin: An Gúm, →ISBN
Gregory Toner, Sharon Arbuthnot, Máire Ní Mhaonaigh, Marie-Luise Theuerkauf, Dagmar Wodtko, editors (2019 ), “ochtar ”, in eDIL: Electronic Dictionary of the Irish Language