Joel Hillesum was a son of 542630 and Marianna van Collem. He was deported from Mechelen on 31 October 1942. Presumably Marianna (1937), Rebecca (1937) and Hartog (1938), who were deported from Mechelen together with Jennie Trijtel, were his children.
Stadsarchief Amsterdam, gezinskaart Hartog Hillesum;
S. Klarsfeld en M. Steinberg, Memoriaal van de deportatie der Joden uit België (Brussel 1982)