New answers tagged communities
I don't think there is one right answer, here are a few possibilities you could pick from ethnicities ethnic groups (e.g., here) ethnic divisions (e.g., Wikipedia uses it here and here) communities (also here and here) origins subcultures (e.g., here) traditions
I don't have it with me now, but the Artscroll Ashkenazi kinnot talks in the footnotes somewhere (I think somewhere around kinnah 20-30) about Jews who went to Germany after the destruction of the first Beit Hamkidash and didn't want to go back in the time of Ezra and Nechemia. I don't remember what their source is.
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