Sainte Sève was a semi-legendary saint from Brittany who lived during the 6th century. As the daughter of King Hoël I and Saint Pompeia, she belonged to a prominent religious and royal lineage, being the sister of Bishop Tudwal, one of the seven founders of Brittany, as well as Saint Léonor and Hoël II. Historical accounts suggest her brother Tudwal established a monastery near Morlaix around 530 to serve her, a site located close to her modern-day namesake village.