Meijer, Engelina and Marianne Viskoop were children of Isaac Samuel Viskoop and Rosetta Tabakspinder. They came from a family of nine children in total, of whom eight died during the war. One child had died before the war, just like the parents. Engelina and Marianne worked for the 'Bijenkorf' warehouse in Amsterdam.
Addition of a visitor of the website
In addition, a Jokos file (number 54616) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.