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)
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.