Kingdom of Desmond
According to tradition, they descend from the ancient Uí Fidgenti (Uí Chonaill Gabra sept) of County Limerick, being descendants of Dáire Cerbba, and are thus cousins of the O'Donovans and O'Collins. Other ancestors, through marriage, include the Kings of Thomond of the great O'Brien dynasty, the MacCarthy Mor dynasty of the great Kingdom of Desmond, the two O'Sullivan dynasties Beare and Mor, O'Callaghan, O'Connor Kerry, O'Donovan of Clancahill, and the O'Donoghue Dhuv sept of O'Donoghue of the Glens.