About Tydfil
Tydfil was a religious leader.
Saint Tydfil (Welsh: Tudful; martyred ) is the legendary dedicatee of Merthyr Tydfil, Wales. The old parish church of St Tydfil, Merthyr Tydfil, is dedicated to her and is reputed to be the site of her death.
According to legend, Tydfil was the twenty-third daughter of Brychan, king of Brycheiniog, by his fourth wife. Tydfil was murdered with her brother Rhun in Merthyr Tydfil, by either Welsh pagans or Anglo-Saxon pagans, and buried in the town. The daughter church of St Tydfil's Well is in the area of Merthyr Tydfil known as 'The Quar' (quarry).
St Tydfil's Church in Llysworney in the Vale of Glamorgan is dedicated to her, as was a chapel in Llantwit Major church until it was given to Tewkesbury Abbey.
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Important facts
Frequently asked questions
Who was Tydfil?
Welsh saint
When was Tydfil born?
Tydfil was born in Brecon.
When did Tydfil die?
Tydfil died in 480 in Merthyr Tydfil.
What was Tydfil's occupation?
Tydfil was a religious leader.
What nationality was Tydfil?
Tydfil's recorded nationality: Kingdom of Gwynedd.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Tydfil. https://biography.guide/tydfil/
MLA: "Tydfil." Biography.guide, https://biography.guide/tydfil/.
Chicago: "Tydfil." Biography.guide. https://biography.guide/tydfil/.
Data last updated: 2026-09-24 · Spot an error? Report a correction.
Portrait: Wikimedia Commons · author & licence
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