Rebecca Emden was a daughter of Abraham Emden and Heintje Vuijsje. She married in Amsterdam on 22 March 1939 to Jacob Casseres. City Archive of Amsterdam, archive card of Abraham Emden and Jacob Casseres.
In addition, a Jokos file (number 52651) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.