Colman mac Duagh was a 6th and 7th-century Irish saint who served as both an abbot and a diocesan bishop. Born in Cork, he spent his early years as a recluse, practicing prayer and fasting on the Aran Islands and later in a cave within the Burren. He eventually established the monastery at Kilmacduagh in County Galway after being asked to lead the territory by King Guaire Aidne mac Colmáin. He is remembered for his ascetic lifestyle and his significant role in the religious foundation of the Aidhne region.