Summer 1939 in Katwijk: Rachel van Gelderen Eijl (m) with her daughters Theresia Helena (Trees) Hahn-van Gelderen (l) en Hester Elisabeth (Bep) Kets de Vries-van Gelderen (r) and her grandchildren. From left to right Sally Hahn, Else Hahn en Robbie Kets de Vries. Private collection
Jacob Salomon Kets de Vries was a son of Salomon Henri Kets de Vries and Elizabeth Oesterman. He married in Rotterdam on 28 May 1930 to Hester Elisabeth van Gelderen.
Municipal Archive of Rotterdam, index marriages.
In addition, a Jokos file (number 31341) on this family 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 …