Michel de Haan was a son of Joseph de Haan and Francina van der Sluijs. He remarried on 18 February 1942 to Clara Bril. Stadsarchief Amsterdam, archiefkaart Michel de Haan
Michel de Haan and Judith Posener married in 1918 in Zaandam. Stadsarchief Amsterdam, archiefkaart Michel de Haan
In addition, a Jokos file (number 9652) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.