Gobrien de Vannes was an eighth-century prelate from Armorica who served as the nineteenth Bishop of Vannes. Born around 660, he received his education at the monastery of Saint-Gildas de Rhuys before being ordained as a priest. During his seventeen-year tenure as bishop, he was known for his dedication to the community, particularly through his service to the sick and the impoverished. Later in life, he retired to a hermitage in Josselin, where he spent his final years.