Caledonian Rhyfelwyr came from a unit of a very similar name in Europa Barbarorum. It has since changed to Balrooae (sp?), and it's the skirmisher unit you get in Scotland. Since then I renamed to just Rhyfelwyr since that's a neater size for a username, although this has had the unfortunate side-effect of leading to accusations of Welshness, propagated mainly by a certain member of the EB Tavern.