- Colum mac Crimthainn
- Colum moccu Loigse
- Columba of Tirdaglas
- Columba of Tyrdaglas
Son of Crinthainn. Disciple of Saint Finnian of Clonard; administered Last Rites to Saint Finnian on his death-bed. Spiritual director of Saint Caemban, Saint Fintan, and Saint Mocumin. Founded the monastery of Tirdaglas (Terryglass) in 548, and served as its abbot. Visited Tours, France, and brought back relics of Saint Martin of Tours. One of the Twelve Apostles of Ireland.
- Book of Saints, by the Monks of Ramsgate
- Catholic Encyclopedia
- Our Sunday Visitor’s Encyclopedia of Saints