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The original was posted on /r/askhistorians by /u/Luftzig on 2023-10-31 05:44:50+00:00.

Today, there is a strong distinction in Jewish communities between groups such as Ashkenazi (from Ashkenaz – Germany), Sephardi (from Sephard – Spain), Mizrahi (Eastern, I think it refers to Arabian peninsula?) and a few other smaller groups like Romanites etc.

When did this distinction emerged? Where the groups ever isolated from each other?