In 1936 a fourth child was born in this family, that only lived for ten months. See for more information on this family USC Shoah Foundation, USC-SF nr. 46916 (interview Tsipora Kidron).
In addition, a Jokos file (number 7347) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.