The clan traces its origin to Anselan O'Kyan, son of a King of Ulster who came to Argyll in 1016.
For his service on the field of battle against the Danes, King Malcolm "The Destroyer" awarded Anselan
lands in Buchanan in Sterlingshire, on the eastern shore of Loch Lomond, the largest freshwater lake in
Scotland. In 1421, Sir Alexander Buchanan slew the Duke of Clarence, who was the son of Henry IV, at the
Battle of Beuge, France. The scholar George Buchanan was tutor to Mary Queen of Scots. The Clan Buchanan
is a Celtic Highland Clan, and has a long and glorious history in Scotland and in the United States.
One member became the 15th US President, James Buchanan. In Gaelic the name means "house of the cannon".
The clan arms are a black rampant lion on a field of gold. The clan has 2 mottos: "Clarior Hinc Honos",
meaning "Brighter the Honor Hence", and "Audaces Juvo", meaning "I Help the Brave" which is used by the
Clan Society. The Society was established in Glasgow in 1725. There is no current Clan Chief.