The Jewish Encyclopedia (1906 edition) had an article on EPSTEIN,
including a graphic family tree going back to Nathan ha-levi EPPSTEIN
in the mid-fifteenth century, ce.

<http://www.jewishencyclopedia.com/articles/5825-epstein/>

It's a bit hard to read (at least in the online scanned version - I
wonder if anyone has access to it in print and could scan it at a
higher resolution?), and I'm not sure how well-researched it is, so
there may be better, newer, sources.

....... tom klein, toronto