Picture: Alan Fryer · CC BY-SA 2.0 · Wikimedia Commons
Deiniol
Welsh saint, first bishop of Bangor
SaintFull write-upWalesPre-congregation
Feast: 11 September (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
530
Died
584
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
On the island of Bardsey off the coast of North Wales, Saint Daniel (Deiniol Wyn), bishop and abbot of Bangor.
The miracles
There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.
Why that counted as sanctity
The Roman Martyrology remembers him on 11 September as bishop and abbot of Bangor.
Connected on this site
- Deiniolen Saint Child
- Dunod Saint Parent
- Dunod Fawr Saint Father, Parent
Sources
- Roman Martyrology, 11 September (Italian Bishops' Conference, Santo del giorno)
- Wikidata Q1183310 — dates, feast day and identifiers (CC0)
- English Wikipedia — Deiniol (CC BY-SA)
Checked against the sources listed on 22 September 2026. Corrections welcome.