Maria Polak was a daughter of Abraham Polak and Sophia Koen. She married 28 June 1928 in Amsterdam to George Polak, a son of Levi Polak and Marianna Loonstein. website www.wiewaswie.nl.
In addition, a Jokos file (number 31939) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.