Eliasar (Elie) Kops was a son of Levie Kops and Femmetje Verdoner, who had passed away in 1933. He married Rachel Veffer in Amsterdam on 22 July 1942. Stadsarchief Amsterdam, archiefkaart Levie Kops.
In addition, a Jokos file (number 8940) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.