From Where Does The Surname Originate? ^{meaning and history}

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Ashkenazi, and variants of this surname, signify that a distant paternal ancestor of the bearer belonged to the Ashkenazi subdivision of the Jewish people.

The Ashkenazi Jews are a Jewish ethnic subdivision who lived in Northern and Eastern Europe. They named themselves 'Ashkenazi' when they first settled the Rhine, in Germany, in the 8th century AD. This was because it was thought 'Ashkenaz,' a place named in the Old Testament, referred to Germany, though modern scholarship suggests this is extremely unlikely.

The vast majority of bearers of the Ashkenazi surname are not Ashkenazi themselves. Rather, they pertain to other Jewish groups, and their ancestor, who would have left an Ashkenazi community to join a different one, retained 'Ashkenazi' as a surname because it was noteworthy that he was from a distinct background to the rest of his adopted community. It is most common amongst Syrian and Bukharan Jews.

The surname Ashkenazi is of Hebrew origin, and ultimately topographical in nature.

As a surname, Ashkenazi refers to the Ashkenazi Jews, a Jewish ethnic division from Northern and Eastern Europe. The word 'Ashkenazi' means 'from Ashkenaz,' a region mentioned in the Old Testament, and thought to refer to Germany, the region that the first Ashkenazi Jews settled in the 8th century AD (although it is now known that 'Ashkenaz' did not refer to Germany). The surname 'Ashkenazi' and its variants are rarely borne, however, by Ashkenazi Jews, but rather, nearly always by Jews from other ethnic divisions who have a distant Ashkenazi ancestor. This ancestor would have left his Ashkenazi community and joined a different Jewish community - Ashkenazi is most common as a surname amongst Syrian and Bukharan Jews. The surname is ultimately of Hebrew origin.