Hi Cheryl

There is a Sub-Carpatian region (that Bereg megye was part of it) genealogy site. This is probably the most complete Sub-Carpatian Jewish data base and they have good search tools too:

 https://sub-carpathia-genealogy.org/.

There is also a Hungarian-Jewish family search group on Facebook called: Zsidó Múlt -> Családkutatás
https://www.facebook.com/groups/385853591885723
 You can post your question on that group.

Hopefully it helps.

Best regards

Ludwig Mauskopf.