This stained glass window in the Chapelle Notre Dame du Calme in Le Méné village shows Saint Tudy.
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.
Port Tudy on Groix island is named after him.