Name Eighneachán Gender Masculine Usage Old Irish, Irish (Modern, Rare) Pronounced Pron. /ˈɛːj.nʲæ.xɑːn/(Irish) Edit Status Status Meaning & History Old Irish Gaelic name of unknown meaning. This was the name of the first chieftain of the O'Donnell clan. In modern times it has usually been reinterpreted as an Irish form of Ignatius.