6th or 7th century. Trillo, son of a Breton chieftain, migrated to Wales
with Saint Cadfan. He is the patron of two places named Llandrillo in
Denbighshire (now Gwynedd) and Monmouth. At Gwynedd there is an ancient
oratory in the Irish style built over a spring that is used for baptisms
named after him. Another Llandrillo in Merionethshire (now Gwynedd) had
a well where rheumatism was cured. A third church at Lladrygarn in
Anglesey still celebrates his feast today in accordance with early Welsh
calendars
(
Benedictines,
Farmer).