So having addressed the limits of dna, it's back to genealogy. I did a search on Klepfisz, there are almost 1000 in JRI-Poland. Are you sure you can't go back further on your trees?
Can you trace your respective families to a particular place or places in Poland?
When were they there?
Your first task is to place both families in the same place at the same time. Start (if you haven't already) by searching the Jewishgen Unified Search.
