David de Haas and Grietje Swaab married in 1917. Besides the here mentioned children they had a daughter Judith, who did not live at home anymore, and a son Jacob who passed away in 1926.
Stadsarchief Amsterdam, archiefkaart David de Haas
In addition, a Jokos file (number 17123) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.