 The Duan Albanach lists an "Áed An" who ruled for four years over Dál Riata and the Synchronisms of Flann Mainistrech place him between Caustantín mac Fergusa and Eóganán mac Óengusa, Caustantín's nephew.It is doubtful whether Caustantín and Eóganán ruled over Dál Riata, but Áed is thought to have done so.Áed may have been preceded as king by Domnall mac Caustantín.