Saint Arnoc was an early Breton saint who lived in Armorica. As the son of Queen Morone and Saint Judicael, he pursued a religious life alongside his uncle, Saint Judoc, in the Ponthieu region. Following the death of his uncle, he and his nephew Winoc took over the hermitage that eventually grew into the monastery of Saint Josse-sur-mer. He later moved to Leon, where he established a chapel that gave its name to the modern city of Landerneau.