Ruaidrí mac Tairrdelbach Ua Conchobair (Modern Irish: Ruairí Ó Conchúir; anglicised as Rory O'Conor) ( – 2 December 1198) was King of Connacht from 1156 to 1186, and High King of Ireland from 1166 to 1198. He was the last High King of Ireland before the Anglo-Norman invasion. Ruaidrí was one of over twenty sons of King Tairrdelbach Ua Conchobair (1088–1156). He and his sister Mór were Tairrdelbach's only children from his third wife, Cailech Dé Ní hEidin of Aidhne. Rig Damna Connachta Ruaidrí was not a favourite of his father, his brother Conchobar Ua Conchobair being Tairrdelbach's tánaiste and designated heir. In 1136, he and his brother Aedh (died 1195) took advantage of a low in Tairrdelbach's fortunes to stage a rebellion. Aedh was blinded by Conchobar on Tairrdelbach's orders but Ruaidrí was protected by the Archbishop of Connacht, Muireadhach Ua Dubhthaigh. In 1143, he staged another rebellion. He was arrested by Conchobar and Tighearnán Ua Ruairc. Ruaidhri, was taken by Toirdhealbhach Ua Conchobhair, in violation of laity and clergy, relics and protection. These were the sureties: Muireadhach Ua Dubhthaigh, with the clergy and laity of Connacht; Tadhg Ua Briain, lord of Thomond; Tighearnan Ua Ruairc, lord of Breifne; and Murchadh, son of Gilla-na-naemh Ua Fearghail, lord of Muintir-Anghaile. The clergy of Connacht, with Muireadhach Ua Dubhthaigh, fasted at Rath-Brenainn, to get their guarantee, but it was not observed for them. After a year's imprisonment, Archbishop of Armagh Gilla Meic Liac mac Diarmata sought his release by April 1144, along with his confederates Domnall Ua Flaithbertaig and Cathal Ua Conchobair. However, Tairrdelbach only acquiesced upon the assassination of Conchobar in Mide, later that year. Tánaiste Tairrdelbach now chose another son, Donnell Mor Mideach Ua Conchobair, as tánaiste, but Ruaidrí improved his status with raids against Tighearnán Ua Ruairc in 1146 and capturing and killing Tairrdelbach's nephew and opponent, Domnall Ua Conchobar, in 1150. Donnell Mór Mideach began to lose favour in 1147 and his fate was sealed when he was arrested in 1151, making solid Ruadrí's claim as his father's heir. In that year, Ruadrí successfully raided Thomond, where Tairrdelbach won a great victory at the Battle of Móin Mór. Dearbhforgaill's alleged abduction In 1152, Muirchertach Mac Lochlainn travelled into Mide, compelling hostages of Tairrdelbach. "They divided Meath into two parts on this occasion; ... On this occasion Dearbhforgaill, daughter of Murchadh Ua Maeleachlainn, and wife of Tighearnan Ua