Donnchad Ua Cerbaill or Donnchadh Ó Cearbhaill, king of Airgíalla, fl. c. 1130–1168. Ua Cerbaill was a supporter of the Irish religious reform movement...

kingdom of Airgíalla was at its peak in the 12th century, under king Donnchad Ua Cerbaill. The later constricted kingdom of Airgíalla survived in Monaghan—which...

Lochlainn king of Tír Eogain and high king of Ireland. With the help of Donnchad Ua Cerbaill, king of Airgíalla, Áed was able to become king of Tír Eogain himself...

his mother, Ua Ruairc was a half-brother of Donnchad Ua Cerbaill (d. 1168). Ua Ruairc had at least three children, a son Maelseachlainn Ua Ruairc, who...

of Gilla Brigte Ua Maíl Muaid of Cenél Fiachach. His father was killed in 1023, probably on the orders of his half-brother Donnchad mac Briain who thereby...

Conchobar Máenmaige Ua Conchobhair, died 1189. Diarmait mac Ruaidrí Ó Conchobair, died 1221. Had sons Diarmait (fl. 1237), Donnchad (fl. 1237), Muirchertach...

O'Carroll Kingdom of Airgíalla (Oriel) early in the 12th century under Donnchad Ua Cerbaill. At the same time, the area was removed from the diocese of Armagh...

Toirdhealbhach Mór Ua Conchobhair (old spelling: Tairrdelbach Mór Ua Conchobair; 1088 – 1156) anglicised Turlough Mór O'Conor, was King of Connacht (1106–1156)...

southerly part of Ulaid, Conaille Muirtheimne, had been conquered by Donnchad Ua Cerbaill, king of Airgíalla. The part of Muirtheimne called Cualigne was subsequently...

Muircheartach Ua Briain (anglicised as Murtaugh O'Brien; c. 1050 – c. 10 March 1119), son of Toirdelbach Ua Briain and great-grandson of Brian Boru, was...