Picture: Llywelyn2000 · CC BY-SA 4.0 · Wikimedia Commons
Teilo
Welsh bishop and saint
SaintResearchedWalesPre-congregation
Feast: 9 February (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Born
600
Died
560
verified
Beatified
—
not needed: before formal processes
Canonised
By tradition
recognised before formal processes began
Who they were
Teilo, cousin of St David, was educated under Sts Dubricius and Paulinus and ruled the monastic school at Llandaff. He succeeded Dubricius at Llandaff.
He died at Llandeilo Fawr, probably in or before 560, an old man. Many churches in Wales, Cornwall and Brittany are dedicated to him.
The miracles
It is said that he was formally canonised, but no date is given; he has been honoured since before the Church's formal processes began.
Why that counted as sanctity
A Welsh monk-bishop, companion of St David.
Connected on this site
- Dubricius Saint Teacher
- Gwenhaf Saint Parent, Mother
- Illtud Saint Teacher
- Isfael Saint Pupil
- Paul Aurelian Saint Teacher
- Saint David Saint Teacher
Sources
- Catholic Encyclopedia (1913), via New Advent - St. Teilo
- Wikidata Q680538 — dates, feast day and identifiers (CC0)
- English Wikipedia — Saint Teilo (CC BY-SA)
Checked against the sources listed on 21 September 2026. Corrections welcome.