Saint Colman was a disciple of St Columba, Abbot of Iona and St Fintan, Abbot of Clonenangh. In the Martyrology of Tallagh he is included as Colman Mac h Laighsi on 15 May. He was of the family (clan) of Laoighsigh Ceannmoir, son of Conall Cearnach, a celebrated Ultonian hero who lived in the first century. His father was Lugna and his grandfather was Eugene. Their tribe-name was Mac Ua Loighse.