Feast day: October 11

According to a legend he was born in 525 in Glengiven, County Derry, northern Ireland. His father was a distinguished royal bard, and his mother’s name was Maul. He became a monk under St. Cadoc at Llancarfan, Wales, and was ordained there. After a trip to Rome, he studied under St. Finnian at Clonard, Ireland, accompanied Ss. Kieran, Columba, and Comgall to St. Mobhi at Glasnevin.

He founded the monastery of Agahanoe and served as its abbot. May have founded the monastery of Kilkenny, Ireland, a city named for him. Missionary to Scotland with Saint Columba in 565; known as an effective preacher. Built a church in the place now known as Saint Andrews. He copied out the all four Gospels, and wrote a commentary on them.

He died in 599 at Aghaboe, Laois, Ireland of natural causes.