Updated June 9, 2019 Share: Boy name origins & meanings Celtic : Monk Boy name variations Manix Manix 0 % this year Masculine Rare Find out more Mann Mann 0 % this year Masculine Rare Find out more Mannicks Mannicks 0 % this year Masculine Rare Find out more How Popular Is The Name Mannix Family name origins & meanings Irish : Anglicized form of the Gaelic (Munster) name Ó Mainchín, a variant of Manahan (see Monahan).