The name is equivalent to the Welsh Brychan. Certainly a cousin of King Cado of Dumnonia, it seems most likely that Fracan was a younger son of King Salom of Cerniw. He fled Britain, with his wife, Gwen Teirbron (the Triple-Breasted) and their children, when a pestilence spread through the land. They landed on the Gouet Estuary in Brittany and Fracan established a large estate now named after him, at Ploufragan. He went on to found a church there and at Saint-Frégan (near Lesneven). Hence his saintly reputation.