Tairrdelbach Ua Conchobair

Family background

The youngest son of Ruaidri na Saide Buide (died 1118), his mother was Mor, daughter of Toirdelbach Ua Briain (1009–14 July 1086). His brothers were Niall (killed 1093), Tadc (killed 1097), Conchobar (murdered 1103), Domnall, King of Connacht (deposed 1106). There was at least one sister, Dubhchobhlaigh Bean Ua hEaghra of Luighne Connacht (died 1131). Ruaidri was married to four or more women.

In 1092, King Ruaidri was blinded by Flaithbertaigh Ua Flaithbertaigh, an incident which led to the domination of Connacht by the Dal gCais of Munster, led by Tairrdelbach's uncle, Muirchertach Ua Briain, who possibly took Tairrdelbach into his household to groom him for the day when he would be king of Connacht. (p. 471,MIAE 2005)

However this would not occur until 1106; until then, Connacht endured a prolonged period of civil strife between different factions of the Ui Conchobair, Ui Ruairc of Breifne as well as more minor families of the Ui Briuin and Siol Muireadaigh, including the long-displaced Ui Fiachrach Aidhne. Tairrdelbach's brothers Tadc and Domnall both gaining the kingship at different times, but depended upon the support of Ua Briain.

Reign

In 1106, with the support of his uncle Muirchertach Ua Briain, eighteen-year-old Tairrdelbach deprived his older brother Domnall of the kingship of Connacht. He would remain king of Connacht for fifty years.

"Tairrdelbach carefully maintained his alliance with Ua Briain, sending troops to aid the high king against the Ui Ruaric of Breifne in 1109. But he was also determined to defend his kingdom against predators such as Domnall Mac Lochlainn (d. 1121), king of the north of Ireland." (O'Byrne, p. 471)

Tairrdelbach constructed Dun Bhun na Gaillimhe ("Fort at the Mouth (bottom) of the Gaillimh") in 1124. A small settlement grew up around this fort and eventually this developed into Galway city.

The Cross of Cong, made at the behest of Tairrdelbach was designed to be placed on top of a religious staff or crosier. It was made for the Cathedral church at Tuam. The cross was subsequently moved to Cong Abbey. He is also believed to have refounded Cong Abbey ca. 1135.

Moin Mor

Despite giving hostages to Muirchertach Mac Lochlainn in 1150, and thereby ceasing to be King of Ireland, Tairrdelbach was still capable of active overlordship in southern Ireland. In 1151 he and his allies - King Diarmaid Mac Murchadha of Leinster, Maelseachlainn son of Murchadh O Maelseachlainn of Mide, King Tighearnan O Ruairc of Kingdom of Breifne - met the forces of King Toirdhealbhach O Briain of Thomond at Moin Mor near Glanmire. In what was one of the most decisive battles ever fought in Ireland, Tairrdelbach defeated O Briain, killing "7000". According to the Annals of Tigernach:

"Until sand of sea and stars of heaven are numbered, no one will reckon all the sons of the kings and chiefs and great lords of the men of Munster that were killed there, so that of the three battalions of Munster that had come thither, none escaped save only one shattered battalion."

Wives and children

Tairrdelbach had the following known wives:

Dubhaltach Mac Fhirbhisigh, writing in 1649, wrote the following account of Tairrdelbach's family (219.16 – 220.13, pp. 486–489):

" Toirdehealbach Mor s. Ruaidhri, high-king of Ireland, had many sons; Ruaidhri, king of Ireland also, Cathal Croibhdhearg, king of Connacht, Domhnall Mor, tainst of Connacht (to him was finally granted the hundredfold increase) were his three sons by his wife; Maol Iosa, coarb of Coman, was the eldest of his family (and his heir), and Aodh Dall and Tadhg Alainn and Brian Breifneach and Brian Luighneach, Maghnus and Lochlainn, Muircheartach Muimneach, Donnchadh, Maol Seachlainn, Tadhg of Fiodhnacha, Cathal Mioghran, two [sons named] Conchabhar, Diarmaid, Domhnall, Muirgheas, Tadhg of Dairean, Murchadh Fionn."

1. – Conchobar Ua Conchobair, fl. 1126–1144
2. – unnamed daughter, wife of Murchadh Ua hEaghra, murdered 1134
3. – Aedh Dall Ua Conchobair, fl. 1136–1194
4. – Ruaidri Ua Conchobair, fl. 1136–1198
5. – Tadhg Alainn Ua Conchobair, died 1143/1144
6. – Cathal Migaran Ua Conchobair, died 1151 or 1152
7. – Cathal Crobdearg Ua Conchobair, 1152–1224
8. – Donnell Mor Mideach Ua Conchobair, died 1176
9. – Brian Breifneach Ua Conchobair, fl. 1156
10. – Brian Luighnech Ua Conchobhair, fl. 1156–1181
11. – Maghnus Ua Conchobair, died 1181
12. – Mor Ni Conchobair, died 1190
13. – Muirchertach Muimhnech Ua Conchobair, died 1210
14. – Mael Isa, Abbot of Roscommon, died 1223
15. – Muirgheas the Canon, died 1224
16. – Aedh
17. – Maghnus
18. – Lochlann
19. – Donchadh
20. – Maol Seachlainn
21. – Tadhg Fiodhnacha
22. – Conchobair
23. – Diarmaid
24. – Tadhg Dairean
25. – Murchadh Finn
26. – Uran

Via his son, Brian Luighnech O Conchobhair, descended the dynasty of the O Conchobhair Sligigh, and from Cathal Crobdearg Ua Conchobair his youngest son both the O Conchobhair Ruadh and the O Conchubhair Donn.