Hi Jonathan, I just joined Ances.Com. I am trying to trace my Pfeffer lineage into the present. My ancester Czarna Neuman (might have been Americanized to "Celia?) married Abraham Pfeffer. It now seems that the family may have come to either Poland or Austria from origins in the Ukraine. They gave birth to a daughter named Klara Jetka Pfeffer, b.1896, & a son Nuchim (possibly called "Nathan") born in 1898. On Ancestry.com I am finding a family that looks like a match, but many more younger siblings are listed. Since I don't know what happened to this line, it might well be my family. Please let me know if any of this sounds like your Pfeffer Family?
Best, Jeannette Nemon-Fischman