Meaning and Origin of: Moynihan

Family name origins & meanings

  • Irish : Anglicized form of Gaelic Ó Muimhneacháin ‘descendant of Muimhneachán’, a diminutive of the byname Muimhneach ‘Munsterman’, i.e. someone belonging to the province of Munster. (In County Mayo this surname has sometimes been changed to Munster.)