Hartog van Gelderen and his family moved in 1941 from Rotterdam to Dordrecht. In 1943 the family moved to Amsterdam.
Stadsarchief Amsterdam, archiefkaart Hanna Yehudith van Gelderen
In addition, a Jokos file (number 55116) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.