I have one of those names that could have come from a lot of places. Although dad came from Ireland, there are variants in French, Scots, and Hebrew that I know about. Nevertheless, the name comes up on this site in lists and very little else. I think the site was once used to sell a book but it doesn't seem to be available. Since there's a page for articles that seems to have most recent first, I'd guess you can avoid the newsletter and still read their latest stuff. They also have a page called surnames which is a link to all the articles with that name somewhere in the text.