The MacMahon's of Thomond

The MacMahon's of Thomond originated in the province of Munster, in County Clare and descends from the founder of the O'Brien dynasty, Brian Boru, through his son Teige, d. 1023, his son Turlough, d. 1086, his son Murtagh More, d. 1119, and his son Mahone 'a quo MacMahons of Corcabaskin' d. 1129.[3] They became lords of the Corca Bhaschind or Corcavaskin area of south-west Clare which comprised the baronies of Moyarta and Clonderlaw, displacing the local O'Donnells and O'Baiscinn.

The McMahon's where involved in countless wars in Ireland, even after the British conquest. The McMahons are noted for having owned, Carrigaholt Castle, Leamaneh Castle and Knappogue Castle. The McMahon family have been involved in British interests ever since, in both military campaigns in Ireland and across the empire and in business. The descendants of the MacMahon's (now spelled McMahon) are noted businessmen, mainly involved in retail and real estate as well as still being politically active.

 

Source: Wikipedia