Tudy of Landevennec

Tudy (Tudi, Tudec, Tudinus, Tegwin, Thetgo) of Landevennec was a Breton saint of the 5th or 6th century. He was a hermit who founded monasteries in Brittany and Cornwall. The village of St Tudy in Cornwall is named for him. He may have been a disciple of Saint Maudez (Maudet, Mawes), after whom St Mawes is named. His companions may have included Saint Corentinus and Saint Brioc. Île-Tudy, on the mouth of the Odet, is named after him.

His feast day is observed on 9 May or on 11 May.

...
Wikipedia