Esther Degen was a daughter of Nathan Degen and Mietje van West. She married Alexander Sturkop in 1924. Stadsarchief Amsterdam, archiefkaart Mietje van West
In addition, a Jokos file (number 55745) 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 3).