Dubda mac Connmhach, Eponym and Ancestor of the Clan Ó Dubhda of north Connacht, fl.
Dubda mac Connmhach was a grandson of King Donn Cothaid mac Cathail of Ui Fiachrach Muaidhe (died 772) and eponymous ancestor of Clan Conway (Connmhach).
Dubhda traced his descent back to Nath Í mac Fiachrach (aka Dathí), son of Fiachrae, the older half-brother of the semi-legendary Niall Noígíallach (died c.
According to Dubhaltach Mac Fhirbhisigh (263.8), Dubhda was the younger brother but came to an arrangement with Caomhán in which Dubhda would become king, while "Caomhán's representative should have a choice of territory as his patrimony and (the right to be at) the shoulder of the king of Ui Fhiachrach always" and other rights besides.
His grandson, Aed Ua Dubhda (died 983) would become King of Ui Fiachrach Muaidhe.