Saint Kessog was an Irish missionary of the mid-sixth century active in the Lennox area and southern Perthshire. Kessog was Scotland's patron saint before Saint Andrew, and his name was used as a battle cry by the Scots. Son of the king of Cashel in Ireland, Kessog is said to have worked miracles, even as a child. He left Ireland and became a missionary bishop in Scotland. Using Monks' Island in Loch Lomond as his headquarters, he evangelized the surrounding area until he was martyred, supposedly at Bandry, where a heap of stones was known as St Kessog's Cairn. Kessog was killed in 520 AD.
The St McKessog's church in Luss on the banks of Loch Lomond is named after Kessog and in the church resides his effigy. Kessog is claimed to have brought Christianity to the area around Luss in 510AD and 1500 years of continuous Christian presence in the area will be celebrated in 2010AD.
Those of us who have Celtic or Scots' ancestry should regard this as a great day. Indeed, as the patron saint of Scotland before Rome saw that he was replaced by St Andrew as evidence of the native church's submission to Rome. It should be especially important to American Anglicans in that we received the apostolic succession from the Catholic remnant of the ancient Church of Scotland.