Julius Max Heynemann

Information courtesy of various sources, including the following:

Heynemann Arthur born Magdebur - Genealogy.com

https://www.genealogy.com/forum/surnames/topics/heynemann/2/

Plus these interesting details here:

http://www.sudenburg-chronik.de/Industrie/Berg.htm

Concerning the Paul BERG - "BERG & KLAUE" Sackfabrik & Sackgrosshandlung in Magdeburg. It features several members of this (presumably) HEYNEMANN family.

e.g. Julius must have died before this 1917 listing for the firm:

Halberstädter Straße 129ab:

Heynemann's Witwe, Emilie Heynemann, G.m.b.H., Julius, Halberstädter Straße 129ab.