Daniel Sjouwerman died on 7 August 1943 in Westerbork transit camp and he was cremated on 9 August 1943. The urn with his ashes was placed on the Jewish cemetry in Diemen on field U, row 11, grave nr. 6.
Register van joden die in het kamp Westerbork zijn gecremeerd, 1943-1944; archief van de gemeent…
In addition, a Jokos file (number 33511) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.