Maria Adriana van Straten was a daughter of Salomon van Straten and Annaatje van Gelder. She married in Amsterdam on 14 August 1924 to Samuel Koekoek. City Archive of Amsterdam, archive card of Salomon van Straten.
In addition, a Jokos file (number 34797) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.