Feast day: January 13
Grandson of the British prince Lothus. Hermit and Monk. Missionary to Scotland, beginning at Cathures. Bishop of the Strathclyde Britons in the area of modern Glasgow in 540.
He taught and led there for 13 years, living in great austerity. Exiled in 553 during an anti-Christian uprising by local pagans, he fled to Menevia, Wales, where he stayed with Saint David of Wales. He founded a monastery at Llanelwy, and served as its first abbot. He returned to Scotland in 573, evangelizing the areas of Galloway and Cumberland. He returned to Glasgow in 581 and led his people there for his remaining 22 years. Apostle to northwest England and southwest Scotland.