 His father Colcú mac Bressail (died 722) was called king of Ard Ladrann (near Gorey, Co.Wexford) at his death obit in the annals in 722 which mention that he was killed.He was the great-great grandson of Crundmáel Erbuilc (died 656), a King of Leinster, and was a member of the Sil Chormaic sept.The date of his succession to the Uí Cheinnselaig throne cannot be dated with certainty.