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.
Life and work
After settling in Leon, Arnoc served as a bishop within the small Illy diocese. During his leadership, he constructed two churches in Ploudaniel dedicated to Saint Méen and Saint Eloi. He eventually passed his bishopric to a hermit named Guinien, who was also a relative of his father. His former territory, which consisted of seventeen villages, was located within the parish of Trégarantec.
Veneration
The saint is recognized as the patron of the Trégarantec parish in Finistère. His memory is preserved through the local landscape, including the name of Landerneau. In the parish church of Saint-Théarnec, a relic attributed to him is still kept, maintaining his connection to the region where he performed his religious duties.