Jacques Keizer died on 30 January 1944 in Westerbork transit camp and he was cremated on 31 January 1944. The urn with his ashes was placed on the Jewish cemetry in Diemen on field U, row 14, grave nr. 19.
Register van joden die in het kamp Westerbork zijn gecremeerd, 1943-1944; archief van de gemee…
In addition, a Jokos file (number 60899) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.