Hartog Jacobs and Keetje Leidensdorff had another child that lived on another address in February 1941. Because this child went into hiding it survived the war.
Addition of a visitor of the website
In addition, a Jokos file (number 8130) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.