Seiriol [St Seiriol]
- David E. Thornton
Seiriol [St Seiriol] (fl. 6th cent.), holy man, is the patron of the churches at Penmon (on Anglesey) and Priestholm (an island off the east of Anglesey). His feast is celebrated on 1 February. According to the Welsh saints' genealogies, he was the son of ...