Stained glass window of St Tydfil in Llandaff Cathedral
Merthyr Tydfil, Wales
Saint Tydfil (Welsh: Tudful; martyred c. 480) 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. She was murdered with her brother Rhun in Merthyr Tydfil, by either Welsh or Saxon pagans, and buried in the town. Her holy well Ffynnon Tudful, seems to have disappeared. The daughter church of St Tydfil's Well is in the area of Merthyr Tydfil known as 'The Quar' (quarry).