Deiniolen

Deiniolen (Deiniol ab, Deiniol Ail; or Deiniol Fab) was a Welsh saint of the 6th century. He was a son of Deiniol, first bishop of Bangor. He succeeded his father as second abbot in the monastery at that place, and is said to have founded the church of Llandeiniolen, in Carnarvonshire, in 616. He is conmemorated November 23.