Isaac Poons had a relationship with Ella Jacobson, who lived at the same address, together with her two daughters.
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In addition, a Jokos file (number 53183) on this person 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 1).
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