Marianna Outs-Kooker was a daughter of Hermanus Kooker and Femmetje Kooker-Groen. Marianna had married Jacob in 1932.
Addition of a visitor of the website.
In addition, Jokos files (numbers 10854, 10854) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.