McMahon or MacMahon (older Irish orthography: Mac Mathghamha reformed Irish orthography: Mac Mathúna) is an Irish surname. The surname arose separately in two areas, in west Clare and in Co. Monaghan. The Co. Monaghan (Airgíalla) MacMahons are not related to the Co. Clare (Thomond) MacMahons.
By Dean Hanley
Page : 1