Saint Tewdrig ap Teithfallt

detail of a stained glass window of Saint Tewdrig, date and artist unknown; Llandaf Cathedral, Cardiff, South Wales; photographed on 24 April 2016 by Llywelyn2000; swiped from Wikimedia CommonsAlso known as

  • Tewdrig ap LLywarch
  • Tewdrig of Tintern
  • Theodoricus
  • Theodoric
  • Teudrig
  • Tewdric
  • Tudric



Born a prince, the son of King Ceithfalt of Morganwg; he became king upon his father‘s death. A great supporter of the Church, Tewdrig abdicated in favour of his son Meurig, and then retired to live as a prayerful hermit at Tintern, Montmouthsire, Wales. When the pagan Saxons led by Ceolwulf invaded the region, Tewdrig left his hermitage, took up arms again, led his troops into battle, defeated the Saxons at Pont-y-Saeson, but died from wounds received in the fight. Considered a martyr as he died defending his Christian realm from pagans.



  • the area of Mathern, Wales of wounds received in battle, possibly a head wound based on descriptions of his skull seen in 1615
  • a church named Marthyr Tewdrig was built over the grave, and the town of Mathern grew up around it


Additional Information

MLA Citation

  • “Saint Tewdrig ap Teithfallt“. CatholicSaints.Info. 19 April 2020. Web. 16 October 2021. <>