Chava Schnitzer geb. Schoenbaum wrote a testimonial to Hermann Gruenmandel; it follows that Chava's mother was a daughter of Hermann and married a Schoenbaum. Nelly's maiden and married names, given in the Breslau synagogue community address list (ca 1930), are Gruenmandel and Schoenbaum respectively, so it is likely that she is Chava's mother and so a daughter of Hermann.

Nelly and Max Schoenbaum lived in Breslau at Hoefchenstrasse 88 in ca 1930.