Hartog van Collem, a son of David van Collem and Rachel Olviier, married 5 September 1900 in Amsterdam to Leentje Fransman, a daughter of Isaac Fransman and Saartje Cartoef.
Hartog van Collem had four other siblings, who have been killed in the Holocaust: Sara, Samuel, Jetje, and Levie. His sister Leentje passed away already in 1930 and was interred in the Jewish Cemetery in Diemen.
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