Re: your thoughts/ideas/suggestions
It is possible that the person who arranged the burial or ordered the tombstones did not know.
I see that in my father’s uncles burial permits
Have you found a death certificate.
Does the cemetery know who the funeral home was or the tombstone supplier
Is there a funeral home in Minneapolis that Jews patronized and do they have records
Searching Lubel(ski) from Bialystock, Rodins or Elkins from Gomel, Lapins (Lapunsky ) from Grodno