Saint Tujan was a 5th-century holy man from Armorica. As the son of Arastagn, a lord of Cornouaille, he was selected by Saint Jau to serve as the priest of Brasparts. He is frequently depicted in religious art as a monk holding an abbot's cross, often accompanied by a dog at his feet and a long key hanging by his side. This key represents a tradition where popes gifted gold keys to elders they wished to honor.