Michael Simon Weijl was married to Helena Schaap. Initially, the couple lived at 1 Deventerweg in Zutphen, later at 2 Minervaplein in Amsterdam. They had a child that survived the war.
In March 1942, Het Joodsche Weekblad published an obituary for Michael Simon Weijl.
Amsterdam municipal archive, Records Jokos, Möbel-claim 15123; property Joods Maatschappelijk Werk; Het Joodsche Weekblad, 27 March 1942, 9
In addition, a Jokos file (number 15123) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.