Name McNay Type Surname (from nickname) Usage Scottish Gaelic (Anglicized), Irish (Anglicized) Pronounced Pron. /mək.ˈne͡ɪ/ Other Forms FormsMac Niadh, Nia Edit Status Statusnot set Meaning & History Anglicized form of Gaelic Mac Niadh, a patronymic from the byname Nia ‘champion’.