Category
page 1Irish royal families
House of FitzGerald
Hiberno-Norman or Cambro-Norman dynasty
O'Brien dynasty
Irish noble family
O'Donnell dynasty
Irish clan

Connachta
The Connachta are a group of medieval Irish dynasties who claimed descent from the legendary High King Conn Cétchathach (Conn of the Hundred Battles). The modern western province of Connacht (Irish Cúige Chonnacht, province, literally "fifth", of the Connachta) takes its name from them, although the territories of the Connachta also included at various times parts of southern and western Ulster and northern Leinster. Their traditional capital was Cruachan (modern Rathcroghan, County Roscommon).
Uí Ceinnselaig
Irish dynastic family
O'Neill dynasty
group of families of Gaelic origin prominent in Ireland and elsewhere
list of kings of Ailech
over-kings of the medieval Irish province of Ailech
O'Rourke
180px|thumb|A Defacement (flag)|defaced O'Rourke crest adorns the coat of arms of [[County Leitrim, their historic patrimony]]
'''O'Rourke''' () was an Irish Gaelic clan based most prominently in what is today County Leitrim.
MacCarthy Mor dynasty
Irish clan originating from Munster
Kings of Osraige
Wikimedia list article
Uí Fiachrach Aidhne
O'Kennedy
The '''O'Kennedy family (Irish: Ó Cinnéide), sometimes Kennedy', were an Irish royal dynasty, a sept of the Dál gCais, founded in the Middle Ages who were Kings of Ormond. Their founder was the nephew of High King Brian Boru (1002–1014). The name Cinnéide'' belonged to Brian Boru's father Cennétig mac Lorcáin, King of Thomond, in the tenth century AD. (Brian Boru was an Ard Rí or High King of Ireland). The Kennedys did not descend directly from Brian Boru, but from Cinnéide's eldest son Donncuan. Donncuan's son Mahon was the first to call himself Ó Cinnéide which is Irish for grandson of Cinné
O'Connor
Irish royal family