Hermogius was a Benedictine bishop born in Tui around 900. He is recognized as a saint within the Catholic, Anglican, and Orthodox traditions. During his life in the Kingdom of Leon, he established the Labrugia Monastery in Galicia in 915. He was the uncle of Pelagius of Cordova, who later became a martyr. Following a period of captivity under Moorish rule, Hermogius was released when his nephew took his place as a hostage.