My grandfather was Nathan Appelbaum. He immigrated to the New York City around 1914 from Poland. I know that he had at least one sibling in the NYC area because my mother had a cousin from that side of the family. Her name was Julia Berson (married name). Nathan was married to Clara and they had two children; Abraham and Sarah, but she was called "Sally" (my mother). Does any of this ring a bell with anyone?