Eurfyl ach Padarn was a sixth-century nun originating from Powys. As the daughter of Padarn, she fled to Wales following the shift in power toward Hoel. Historical records regarding her specific life details remain sparse, but she is recognized as a saint within the Christian tradition. Her religious identity is primarily linked to the foundations she established during her time in Wales.
Religious foundations
She is credited with establishing religious sites at Llanerfyl in both Anglesey and Llŷn. At one of these locations, a spring associated with her was utilized for baptisms. This water source remained in use for a significant period until it was intentionally dried up to end the local practice of using it.
Veneration
Eurfyl is commemorated as a saint, with her feast day observed on July 6. Her legacy is preserved through the sites she founded and the religious traditions connected to her name in Welsh history.