I am descended maternally from the GEWELBE family from Warsaw. My third great-grandfather was https://www.geni.com/people/Jak%C3%B3b-Gewelbe/6000000062596309836
(Jacob GEWELBE), and am sure that many of the surviving records and indexes from Warsaw (including someone involved in the Warsaw uprising and also someone else who was on Schilndler's list in Karkow) with this name, were named after this common ancestor, or possibly after a namesake cousin.

One Jacques GEWELBE, born 1895 in Warsaw, lived in Nancy, France and his wife Leonie lived in Basel, Switzerland. They married in Nancy in 1922. I am trying to ascertain, or refute, that the parents of Jacques were Solomon Ephraim and Esther nee GELBROT. Esther died in 1899 (her gravestone can be found though Jewishgen search), and Solomon remarried to my great-grandmother Rebecca nee SINGER.

As is well known, many records are missing on JRI-Poland. I have written to the USA Holocaust museum as Jacques perished in the Holocaust, being on a transport from France to Aushwitz. There is a memorial for him, and also I have papers from the museum attesting to the above narrative, but so far have not been able to obtain names of Jacob/Jacques' parents. Am also being helped along by the organization:-

The Emanuel Ringelblum Jewish Historical Institute

Jewish Genealogy & Family Heritage Center

ul. Tłomackie 3/5, Warsaw, Poland  

phone: +4822 828 5962

email: <familyheritage@...>