Ruben Chizkiah van Gelder was deported to Sobibor in June 1943 from Vught via Westerbork on the so-called children's transport. He was 6 when he died. J. de Moei, Joodse kinderen in het kamp Vught (Vught 1999) 33
In addition, a Jokos file (number 17812) 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 bank (L-claim, number 3817/19721).