Kessog

Saint Kessog was an Irish missionary of the sixth century (around 560 according to Orthodox England, while Wikipedia places him in the middle of the century), a son of the king of Cashel, of whom it is said that he worked miracles even as a child. He left Ireland and became a missionary bishop in Scotland, making Monks' Island in Loch Lomond his base, from which he preached in the Lennox and southern Perthshire. According to tradition he was killed at Bandry, where a heap of stones was known as Saint Kessog's Cairn. The church at Luss on the shore of Loch Lomond bears his name and holds an effigy of him. He is the patron of the Lennox. He is venerated as a saint of the undivided Church and is commemorated on 10 March (new calendar).