I had the same problem. I posted a query on a Rootsweb message born, giving all the info I had and asking if anyone knew the family. Almost two years later a distant cousin contacted me. her Grandmother. (my late Grandmother's cousin) was still alive and eager to help. I suggest you post queries on the Jewish Genealogy sites such as
http://www.jewishgen.org/ as well. Good Luck. Incidentally, my ancestors did not chose a name, they were given one vaguely similar to their own but easier for a British person to say and spell.