Frederik Jack Batavier was deported to Sobibor in June 1943 from Vught via Westerbork on the so-called children's transport. He was 13 when he died. J. de Moei, Joodse kinderen in het kamp Vught (Vught 1999) 15
In addition, Jokos files (numbers 50434, 40374) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.