Saint Ténénan was a Catholic bishop of Armorica who lived during the late 6th and early 7th centuries. Often identified with the saint Tudogilus, he is sometimes considered to be the same person as Saint Tudon. After spending time in an Irish monastery, he traveled to Brittany to preach, eventually settling near Plabennec. Following the death of Saint Goulven, he was chosen to serve as the bishop of Leon, a position he accepted despite his initial hesitation regarding the heavy responsibility.