 According to a late tradition forged by the Treguier scriptorium in the 11th century to legitimize the origins of the monastery of Tréguier and the ecclesiastical properties in the surrounding area, Efflam was the son of an Irish king.Born in 448, married very young to Enora, he took a vow of chastity.An angel helped him to resist temptation, and he fled to Brittany, disembarking at Plestin-les-Grèves, in Trégor, where he had lived for a time in the company of Saint Gestin.