A copy of the ketubah of Eva Roselaar and Hartog Gans, a son of Samuel Gans and Rosette de Vries, remains. Their chuppa was in Apeldoorn on 7 October 1942.
Municipal archive Apeldoorn, Records Nederlands Israëlitische Gemeente Apeldoorn
In addition, a Jokos file (number 376) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.