In addition, a Jokos file (number 55673) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.
Helena Akker en Salomon Koekoek married in Rijswijk in 1942. It is most likely that their hidingaddress was somewhere near the Hofwijkplein in The Hague. Addition of a visitor of the website