Brian Luighneach Ua Conchobhair (died 23 May 1181) was a prince of Connacht.
One of the brothers, Aedh Dall Ua Conchobair, was not so lucky; Ruaidhri had him blinded.
Brian became lord of Cairbre Drom Cliabh (barony of Carbury in what is now County Sligo.
This encouraged King Flaithbertaigh of Tyrconnell to mount raids into northern Connacht, an area over which the Cineál Chonaill had long claimed jurisdiction.
Only one member of the family ever succeeded to the kingship of Connacht, but they were Lords of Cairbre until the mid-17th century.