Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.jewishencyclopedia.com/view.jsp?artid=169&letter=I&search=Ireland
Description:
An island west of Great Britain, forming part of the United Kingdom of Great Britain and Ireland. The earliest mention of Jews in Ireland appears toward the end of the eleventh century, although, curiously enough, quite a number of books have been written to identify the Irish with the Lost Ten Tribes.