Ashkenazi Jews are smart. Shockingly brilliant, in general. Impressive in brain power. How did they get that way? Ashkenazi Jews, aka Ashkenazim, are the descendants of Jews from medieval Alsace and the Rhine Valley, and later, from throughout Eastern Europe. Originally, of course, they were from Israel. Genetic research from the Albert Einstein College of Medicine suggests that the Ashkenazi bloodline branched away from other Jewish groups there 2,500 years ago, and that 40% of them are descended from only four Jewish mothers.