Simon Karel Zwarts, a sales representative, son of Aron Zwarts and Aaltje Hartz, married Johanna Swart, the third of Levie Swart and Maria Peper's seven children, in Amsterdam on 8 June 1922. Simon Karel Zwarts was the widower of Roosje Vos.
The Zwarts-Swart couple had two children: Alida and Louis.
A copy remains of Simon Karel Zwarts and Johanna Swart's marriage certificate.
In addition, a Jokos file (number 32443) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.