About John Trevor
John Trevor was a catholic priest and catholic bishop.
John Trevor (died 1357) was the first man of that name to hold the position of Bishop of St Asaph in north Wales, from 1346 to 1357.
The famous bridge across the River Dee at Llangollen, Denbighshire is reputed to have been built in about 1345 by John Trevor, who was then living at nearby Trefor Hall. His father, Iorwerth ab Adda, is buried at nearby Valle Crucis Abbey.
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Important facts
Related people
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Frequently asked questions
Who was John Trevor?
bishop of St Asaph (died 1357)
When was John Trevor born?
John Trevor was born in Trevor.
When did John Trevor die?
John Trevor died in 1357.
What was John Trevor's occupation?
John Trevor was a catholic priest and catholic bishop.
Sources & further reading
· DBpedia: John Trevor (died 1357)
Cite this page
APA: Biography.guide. (2026). John Trevor. https://biography.guide/john-trevor-catholic-priest/
MLA: "John Trevor." Biography.guide, https://biography.guide/john-trevor-catholic-priest/.
Chicago: "John Trevor." Biography.guide. https://biography.guide/john-trevor-catholic-priest/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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