 From this branch descended Domhnall Caomhánach, founder of the Caomhánach family.Another segment of the Uí Ceinnselaig family, the descendants of the Uí Ceinnselaig dynast Domnall Remar mac Mael na mBó, took the Irish surname "Ua Domnaill".Both branches—the Meic Murchada and the Uí Domnaill—were bitter rivals over the kingship of Uí Ceinnselaig.