[wslh]

Impressive research! I have an story that is related to this kind of history research and genealogy but not with math. My great-great-grandfather was born in Gornostaypol [1], before the XX century. He came to Argentina with some of his children and my grandfather. Beyond my family and Internet genealogy will be very difficult to get information (without going to Ukraine...) and who can remember him or something about my family in 2023 in a village with minimum population? The Google search is more complex also because his surname was "men".

So... a post appeared in July 13, 2022 talking about my great-great-grandfather from the memories of a women who was born in 1938 [2]. Those are amazing things such as searching a needle in a haystack. Randomness helps.

[1] https://en.wikipedia.org/wiki/Hornostaipil

[2] https://jewua.org/gornostaypol/