She married Mr. Aurebach after having my grandmother in 1886, Rachel or Rifkin Blyerovskova or blackeroff
I'm going to tag your great question for @Russian Empire Genealogy Research
and there are two Facebook pages also. You have to sign in.
Eastern Europe Genealogy
Ukraine Genealogy Group
I hope this helps.
Have you tried using JewishGen? It's a great place to start your research, and it's free. The site can be accessed here: https://www.jewishgen.org/.
If you don't find anything there, let us know and we can help you look at additional resources.