DATZ and SATZ Families from Mogilev-Podol'sk #ukraine

Janis and Joe Datz

I am trying to figure out the connection between DATZ and SATZ.  Satz continues to match DNA with the Datz family.  All stories told by elders insist that Datz was always spelled this way.  The families are from Mogilev-Podol'sk Ukraine.   Many thanks for any information that would connection the families as well as purpose of name change.  Somewhere in this puzzle is, I believe, surnames of Shatz or the like.

Janis Friedenberg Datz

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