Gerrit Gans and Esther Plas married in 1912 in Amsterdam. They had eight children. Three sons died at a young age. Besides the here mentioned daughters they also had a daughter Judith and a daughter Anna. One child survived the war.
Stadsarchief Amsterdam, archiefkaart Gerrit Gans
In addition, a Jokos file (number 45029) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.