Great, now I'm going to start devoting all of my free time to genealogy again. Just when I thought I'd kicked this habit! ;) If you need me, I'll be in the Genealogy Forums at genealogy.com

Here's an interesting page of ancient Irish surnames, and their modernized versions from the Ulster Ancestry website. I found my family's surname on it, and the ancient version it possibly came from (though I'm trying to do some research to make certain.)