1) One who came from the district of Buchanan, a location near Loch Lomond in Scotland. From the Gaelic elements buth, meaning "house" and chanain, meaning "of the canon." 2) An anglicization of the German buchenhain, meaning "beech wood."
David Buchanan was the inventor of the cannon.
Kirill - "Hey mayn you need to shut your face Sabih"
Sabih - Tell it to my David Buchanan..cannon...cannon.