I like xmarksthescot.com It's kind of a play of words, and it defines that this is a kilts only site.
The name may keep away the people that believe that a demin mini from walmart is a kilt, and that it has nothing to do with Scottish heritage.

There is plenty of Celtic related topics, but you don't need to be Celtic to participate. I am a Celt, but have had great conversations with those that aren't.

My vote is to keep the name as is.