Jacob Hamel was a son of Israel Jacob Hamel and Sanne van Tijn. He got married in Weesp in 1911. The couple had four children: Philip, Abraham and two children who survived the war.
More information on the Hamel familie can be found in C.N.M. van der Voort, Geschiedenis van de Gooische metaalhandel I. Hamel en zonen (Hilversum 1993).
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