My grandfather was a Buchanan. Edgar "Uncle Joe" Buchanan was a distant cousin of his. Also President James Buchanan was related somehow. And there's a really cool castle on Loch Lomond that bears the Buchanan name. It eas built by Anselan O'Kyan, founder of the Buchanan clan. He was the son of one of the kings of Ulster. It's alleged that McBeth was based on him.