Joseph Koekoek was a son of Levie Koekoek and Bernice Tokki. He married Ester Hakker on 15 June 1938 in Den Haag, a daughter of Salomon Hakker and Grietje Porets.
The couple had no children.
Municipal Archive of Den Haag, family registration card of Joseph Koekoek and Civil Registry of Den Haag, cer…
In addition, a Jokos file (number 9348) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.