Max en Rosa Lange were cousins of Isaak Salomon Lange. They had come to the Netherlands from Frankfurt am Main. One child of Isaak Salomon Lange survived the war.
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In addition, a Jokos file (number 55086) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk. The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 6945/21271).