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The MacMahons lost control of Monaghan after the Irish Rebellion of 1641. Led by Colla Mac O'brian MacMahon, the MacMahons rose in revolt with O'Neill and other Ulster clans in an attempt to seize Dublin Castle and overthrow the English Tudor kingdom.
The MacMahons of Thomond were Princes of Corca-Basginn, now embracing the baronies of Moyarta and Clonderalaw, in the County of Clare. The ancient name of the McMahons of Clare was Mainchim, the meaning of which is “Wounded Hand,” and they bore the title of Lords of Moyarta.
Several MacMahons took prominent roles during the course of history in Thomond, Teige Caech MacMahon rose in rebellion against the English authorities and was the only local chieftain to lend support to Red Hugh Ó Donnell and participate in the last great battle of Kinsale for the survival of the Gaelic chieftains.
Mar 22, 2013 · 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]
- Mcmahon Clan
THE following were the Irish chiefs and clans of ancient Thomond, or the counties of Limerick and Clare: 1. O'Dea, chief of Dysart-O'Dea, now the parish of Dysart, barony of Inchiquin, county Clare. 2. O'Quinn, chief of Muintir Ifernain, a territory about Corofin in the county Clare.
Two septs arose in Ireland with the surname McMahon, one in the Kingdom of Oriel in the province of Ulster, around modern County Monaghan; the second in Thomond, in the province of Munster, in modern County Clare.
Thomond was wealthy in the 15th century; Domhnall Mac Gormáin (died 1484) was described as the richest man in Ireland in terms of live stock. During the reign of Conchobhar na Srona Ó Briain, Thomond maintained alliances with the Mac William Uachtar of Clanricarde and the Butlers.
