Beside the deceased baby-sister, all other siblings have been killed during the Holocaust: she self, Johanna, Clara, Salomon, Hartog (and his wife Rachel de Meza), Bertha and Jacob.
City Archive of Amsterdam, archive card of Manuel Hilversum and website www.wiewaswie.nl .
In addition, a Jokos file (number 50200) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.