McMahon

McMahon or MacMahon (UK /məkˈmɑːn/, US /məkˈmæn/, US /məkˈmeɪən/, US /məkˈmɑːn/) (older Irish orthography: Mac Mathghamhna reformed Irish orthography: Mac Mathúna) is an Irish surname. The surname arose separately in two areas: in west County Clare and in County Monaghan. The County Monaghan (Airgíalla) MacMahons are not related to the County Clare (Thomond) MacMahons.