The Origins of Jewish Surnames - As a distinct ethnic group in Early Modern Europe, Jews followed different surname conventions than many of their neighbors.
A Dictionary of Jewish Names and Their History
Roots of names from Aaron (and its derivatives Agronsky, Arkin, and Orlik) to Zwirn (German for thread)
Jewish Family Names and Their Origins: An Etymological Dictionary
This dictionary is the most complete compilation of its kind in English, containing over 65,000 family names
From Generation to Generation: How to Trace Your Jewish Genealogy and Family History
Far more engaging than a mere how-to reference guide, this landmark book is also part detective story and part spiritual quest.
JewishGen - The Home of Jewish Genealogy
Thousands of databases, research tools, and other resources to help those with Jewish ancestry research and find family members.
Louis Kessler's Jewish Genealogy Links
There are thousands of web pages out there of interest to Jewish Genealogists.
A Research Tool for Sephardic Genealogy / Jewish Genealogy