I do not know whose email you were responding to, but I have contact with both Kronenbergs (Nathan and descendants) and Chermerinskys (Irwin and descendants) and would be happy to link you up with them if you so desire. 
--
Henry S. Levine, MD
Bellingham, WA, USA
Originally from Passaic, NJ
HLevineMD@...
Researching ISRAEL and SCHIFFMAN in Ropczyce (Ropshitz) and Lopuchova (Lupakhev), Galicia
LEVINE and LONDON in Pakuonis, (Pakon) Lithuania
LOWENSTEIN in Kaunas (Kovno), Lithuania