Marcus van Zuiden was married to Aaltje Nijstad.
Stadsarchief Amsterdam, archiefkaart Hartog van Zuiden
In addition, a Jokos file (number 15604) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
This family is commemorated on a memorial in Assen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.