Behind the Name Searchable database featuring the etymology and history of last names. surnames.behindthename.com/
Glossary of Last Name Meanings and Origins Indexed reference includes meanings, common spelling variations, and genealogy resources for last names from around the world. genealogy.about.com/library/surnames/bl_meaning.htm
Last Name Meanings Find the ethnic origin and meaning of last names including Irish, German, English, French, Italian and Jewish descent. www.last-names.net/
What's In Your Name? Database of last names providing information on etymology and history. www.vitalog.net/