Welsh royalty. Son of King Sant of South Wales and Saint Non. Grandson of Ceredig, Prince of Cardigan. Uncle of King Arthur. Priest. Studied under Saint Paulinus. Collaborated with Saint Columba, Saint Gildas, and Saint Finnigan. Missionary and founder of monasteries.
Following his contribution to the synod of Brevi in Cardiganshire, he was chosen primate of the Cambrian Church. Archbishop of Caerleon on Usk; moved the see to Menevia. Presided at the Synod of Brefi which condemned the Pelagian heresy. Encouraged and founded monasteries. First to build a chancel to Saint Joseph of Arimathea's wattle church at Glastonbury.
After a vision in his monastery in the Rhos Valley, he set out next day with two monks to Jerusalem to aid the Patriarch. While there his preaching converted anti-Christians. Legend says that once while he was preaching, a dove descended to his shoulder to show he had the blessings of the Spirit, and that the earth rose to lift him high above the people so that he could be heard by them all.
Died: c.601 at Mynyw, Wales