I think I've heard Bernstein say that he had some sort of uncle who also attended South Shore High School. That's one Jewish community that's long gone. The only Jewish communities, of which I'm aware, left on the South Side (writ large) are Hyde Park and the Homewood/Flossmor/Olympia Fields area.

Apparently Glaucoma Bob thinks all old white guys look alike.

The guy who mapped DNA, Larry Ellison, at least one Hollywood studio boss among others. Shortly before we moved here there were something like 22 synagogues and only like five or six Catholic churches. Iirc there was one corner on 72nd Street where three future studio bosses grew up.