Simon de Zwarte and Mietje Polak married in 1897 in Amsterdam. They had nine children, among whom Juda, Salomon (who passed away in 1902), Elsje, Salomon (who passed away in 1906), David, Joseph and Schoontje.
Stadsarchief Amsterdam, archiefkaart Simon de Zwarte
In addition, a Jokos file (number 14950) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.