The Jewish E Project (formerly Jewish E3b Project) is open to all males in Y-DNA haplogroup E and any of its subclades, who have KNOWN Jewish ancestry on their direct paternal line (your father's father's father, etc).
The E haplogroup has been observed in all Jewish groups world wide. One of its major subclades, E1b1b (formerly E3b) is considered to be the 2nd most prevalent haplogroup among the Jewish population.
According to one major paper, Contrasting patterns of Y chromosome variation in Ashkenazi Jewish and host non-Jewish European populations E-M35, which defines the E1b1b1 (formerly E3b1) haplogroup, is considered to be the second highest, next to J, for "Founding Jewish Lineages" in Europe. It is found in moderate amounts in all Jewish populations, from Ashkenazi, Sephardic, Kurdish, Yemen, Samaritan and even among Djerba Jewish groups.
Major Papers on Jewish Populations:
|Multiple Origins of Ashkenazi Levites: Y Chromosome Evidence for Both Near Eastern and European Ancestries; Doron M. Behar, Mark G. Thomas, Karl Skorecki, Michael F. Hammer, Ekaterina Bulygina, Dror Rosengarten, Abigail L. Jones, Karen Held, Vivian Moses, David Goldstein, Neil Bradman, Michael E. Weale; Am. J. Hum. Genet. 73:768–779, 2003. |
Contrasting patterns of Y chromosome variation in Ashkenazi Jewish and host non-Jewish European populations
Jewish and Middle Eastern non-Jewish populations share a common pool of Y-chromosome biallelic haplotypes
Y Chromosomes of Jewish Priests
What was really Aaron's lineage? (Cohen modal haplotype)
The Tribe: The Cohen-Levi Family Heritage