Efroim Fiszel Alter Kestenboim was born in Lasocin, Poland, 1903 to Eliahu and Sluve. He was a fur trader and married. Prior to WWII he lived in Ostrowiec, Poland. During the war he was in Ostrowiec, Poland. Efroim Fiszel Alter was murdered in the Shoah. Place of death: Ostrowiec, Poland, 1943.
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