Son of Arwystli Glof ab Seithenyn. Sixth-century monk on Bardsey Island, Wales. Built a church in the village of Lladyfrydog, Wales. A standing stone nearby is said to be a man who stole the bible from that church and got turned into stone.
- “Saint Tyfrydog“. CatholicSaints.Info. 31 December 2013. Web. 24 February 2017. <>