Buchanan Weathered Tartan Heavyweight 16ozClan Buchanan is most well known in Scottish history because it is one of the clans that took their names from the land upon which they established themselves. Its name Buchanan is believed to come from McAuslan meaning son of Ansel. In the last 700 years, the areas of Buchanan on the eastern side of Loch Lomond were possessed by the Buchanan family. In Gaelic Buchanan, the Buchanan name is Mac a' Chanon Aich which translates to "Son of the Canon".