Conchobar Ó Cellaigh, 43rd King of Uí Maine and 10th Chief of the Name, died 1268.
Uí Maine during his reign fell away from subordinate status to the Kings of Connacht and regained something of its former independence, but at the cost of encastellation and settlement under Richard Mór de Burgh (died 1242) and his son, Walter de Burgh, 1st Earl of Ulster (died 1271).
There are only the most indirect references to Uí Maine in the annals, perhaps reflecting the kingdom's reduction into less significance or its domination by the de Burgh dynasty.
Conchobar is stated in the Book of Lecan to have been the eldest son of Domnall Mór Ua Cellaigh.
Ó Cellaigh's mother was Dubh Cobhlaigh Ní Briain, a daughter of King Domnall Mór of Thomond (died 1194).