In addition, a Jokos file (number 8856) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
The Frankenstein family, Max, Käte and Ingrid, lived at Mariannenstr. 46 in Berlin-Kreuzberg prior to emigrating to Holland. (Berliner Gedenkbuch, Jewish Addressbook Berlin 1931)