My guess would be a ketuba, but that's just an assumption at best.
ROTKIER, ROTKER, GOLDMAN, GUTMAN from Warsaw
ZEITLIN, TSEITLIN, ZAITLIN, TSAITLIN from Slonim/Deretchin
FELDMAN from Belarus
SAPERSZTEJN, SAPERSTEIN, KERSZENBAUM, KIRSZENBAUM, KIRSCHENBAUM, KERSCHENBAUM, KIRSCH etc from Ciechanow/Radzanow
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