Wenefride (Welsh Gwenfrewi; Latin Wenefreda) was — per the substantial Welsh hagiographic tradition (the 12th-century Vita Sanctae Wenefredae composed by Robert of Shrewsbury preserves the developed tradition) — a young Welsh-Catholic noble of the small North Welsh kingdom of Tegeingl in Flintshire, the niece and personal disciple of St. Beuno of Clynnog Fawr.
Around 660 AD — when Wenefride was approximately 30 years old — she was attacked at the small Welsh village of Holywell by Caradoc, a substantial regional Welsh noble who had been pursuing her for marriage and whose advances she had publicly refused. When Caradoc — provoked by her refusal — chased her with his sword toward the small chapel where she had taken refuge, he caught her at the chapel door and decapitated her with a sword blow.
Per the Welsh hagiographic tradition: at the place where Wenefride's head fell, a sudden small healing spring burst forth from the ground — the Holywell healing spring that has been in continuous Welsh-Catholic pilgrim veneration ever since. Her uncle St. Beuno arrived almost immediately at the martyrdom site, restored Wenefride's head to her body through prayer, and successfully restored her to life. Wenefride lived an additional 22 years as a Welsh-Catholic religious — eventually as abbess of the small Welsh women's monastic foundation at Gwytherin — before her final 'second death' around 682 AD.
The Holywell spring (Welsh Treffynnon Gwenfrewi, 'Wenefride's town of the spring') is the only Catholic pilgrim healing shrine in the entire United Kingdom that has been in continuous Catholic pilgrim use since the medieval period without interruption through the entire 16th–19th-century period of English-Welsh Catholic suppression. The Welsh-Catholic identification of Wenefride and her healing spring through the substantial Reformation period was preserved through the continuous use of the spring by Welsh Catholic recusant communities. The substantial medieval Gothic Holywell shrine — substantially preserved despite the 16th-century Reformation — is the continuous Welsh-Catholic medieval-architectural object of the entire United Kingdom.