David Zilverberg and Heintje Wertheijm married in 1931 in Amsterdam. They had four children. Their oldest son Eleazer passed away in 1935.
Stadsarchief Amsterdam, archiefkaart David Zilverberg
In addition, a Jokos file (number 12355) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.