Cailtan a Scottish monk, is mentioned by St. Adamnan, St. Colunmb. i, c. 31, and by O'Donnell, St. Colunmb. ii, c. 44, as having charge of a "Cella Diuni,"" in "Stagno Able fluminis," and was suddenly sent for by St. Columba, who saw he was near his death.. The next night, on his arrival, Cailtan became ill and died. The most probable site of his cell is on the creek or bay in Mull, called Loch Buy. Camerarius. gives the commemoration of "St. Cailtanus Abbas' at Feb. 25.