Jonas Muller, a son of Hartog Muller and Rika Bierman, married 27 October 1920 in Amsterdam to Hendrika Engelsman, a daughter of Isaac Engelsman and Rebekka van der Sluis. website www.wiewaswie.nl.
In addition, a Jokos file (number 16891) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.