Buchanan Tartan Heavyweight 16ozClan Buchanan is most well known in Scottish history as being one of the few clans that took their names from the place on which they resided. Buchanan is the name that was given to them. Buchanan is believed to originate from McAuslan which means Son of Ameslan. For nearly 700 years, the land of Buchanan located on the east shore of Loch Lomond was possessed by the Buchanan clan. In Gaelic Buchanan, the name is referred to in Gaelic as Mac a' Chanon