Joseph Cohen was the son of Hendrika Schatz and Salomon Cohen. Hendrika Schatz died 14-03-1914. Salomon Cohen married with Henriette Amalia Pinto May 8, 1916.
Addition by a vistor of the website
GenLias has the following death record:
Ovl 04-01-1952 Groningen #01: Joseph Cohen g. 29-08-1913 Groningen (Salomon Cohen en Hendrika Schatz) ovl 31-03-1944 Midden-Europa
In addition, a Jokos file (number 14829) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.