Cadoc was a 5th-century Welsh abbot and bishop known as the Wise. Born into a royal family in Glamorgan, he chose a religious life over his father's military path, eventually establishing the monastery at Llancarfan. This site became a premier center of learning during the era of the Celtic church. Throughout his life, he traveled extensively, founding religious houses in Scotland, Brittany, and various parts of Wales, spreading his influence across much of the British Isles.