"Ashkenazi" isn't a countryAshkenaz = Germany
"the Jews of Ashkenaz"), are the Jews descended from the medieval Jewish communities along the Rhine in Germany from Alsace in the south to the Rhineland in the north. Ashkenaz is the medieval Hebrew name for this region and thus for Germany. Thus, Ashkenazim or Ashkenazi Jews are literally "German Jews."
Later, Jews from Western and Central Europe came to be called "Ashkenaz" because the main centers of Jewish learning were located in Germany.
Ashkenazi intelligence is the conjecture that the higher general intelligence measured in IQ tests of Ashkenazi
German Jews have an higher IQ as other Jews....also Germans have an higher IQ as other Europeans (coincidence?)
The Yiddish language, which many people think of as the international language of Judaism, is really the language of Ashkenazic Jews.
Most American Jews today are Ashkenazic, descended from Jews who emigrated from Germany and Eastern Europe from the mid 1800s to the early 1900s