Tyfrydog
Tyfrydog (sometimes given as Tyvrydog) was a Christian from north-west Wales in the fifth or sixth century, who was later venerated as a saint. He is said to have established a church in Anglesey, and although no part of the original structure remains, the current church is still dedicated to him. A nearby standing stone is said to be the remains of a man who he punished for stealing a bible from the church. Life and family Little is known for certain about Tyfrydog's life, and his dates of birth and death are unknown. He is said to have lived towards the end of the sixth century, although another account has him as active during the middle of the fifth century. His father is recorded as being Arwystli Glof ab Seithenyn, active in the middle of the sixth century. Both he and his father are said to have been part of the Christian community on Bardsey Island, at the tip of the Llŷn Peninsula in north-west Wales. Some of his siblings are also venerated as saints. Twrnog is commemorated at the church in Llandyrnog, Denbighshire, in north-east Wales, while his brother Tudur (or Tudyr) was recorded as a saint from