Quote Originally Posted by MacWage View Post
That is one of the theories.
Matt Newsome wrote a good article on it here:
Oh, thanks for the link... you reminded me where I'd read it, which was the Scottish Tartans Authority web page. It provides slightly different details than Matt chose to focus on, and the two together have completely convinced me.

Though I'll probably get one of Celtic Croft's Ancient Kilts (historically inaccurate though they be) before going for the Great Plaid, myself.