"ScienceDaily (Jan. 17, 2006) Some 3.5 million or 40 percent of Ashkenazi Jews are descended from just four founding mothers who lived in Europe 1,000 years ago. The mothers were part of a small group who founded the Ashkenazi Jewish community, which was established in Europe as a result of migration from the Near East."
Do you know if they have identified a certain Haplogroup that identifies with the Ashkenazi Jews?