Chieftain and layman. Proposed marriage to Saint Gladys, the daughter of Brychan of Brecknock. When Brychan refused, he kidnapped her, and the two started a violent life on the run. Father of Saint Cadoc of Llancarvan who eventually convinced Gwynllyw and Gladys to give up their violent ways, and follow a religious calling. Monk at Newport, Monmouthshire, Wales. Late in life he became a hermit in rural Wales. An Anglican cathedral is dedicated to him in Newport, Gwent, Wales.
- “Saint Gwynllyw“. CatholicSaints.Info. 30 March 2016. Web. 7 December 2016. <>