(d. c.575), abbot. Of Irish origin, he was educated at Llantwit Major by Illtud. With Samson he went to Brittany and founded monasteries under the protection of King Childebert. Maglorius became abbot of one of them near Dol. After some years he retired to Sark, where he founded a monastery and died. A connection with Jersey is also claimed by his late Life: his removal of a tiresome dragon was rewarded by gifts of land.
His relics were translated, first to Lehon (near Dinant) in 857 and later to Paris at the time of the Viking invasions. They are still claimed by the church of Saint-Jacques. His cult is witnessed by additions to the Martyrologies of Bede and Ado, by Breton calendars, N.L.A., and Richard Rolle. Feast: 24 October.
From The Oxford Dictionary of Saints in Oxford Reference.