Louis Oppenheimer and Betty Kramer had six children: Selma daughter of Louis Oppenheimer and Johanna Kramer (died in Oss, 05 april 1910) a sister of Betty Kramer), Henriette, Frits, Ernst and two children who survived the war. Henriette, Frits (1919) and one of the surviving children resided at another address.
Addition of a visitor of the website
In addition, a Jokos file (number 3984) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.