Willem Slier was married to Dina van der Maas, who passed away in 1932 forty-six years old. She is buried in Jewish cemetery "Toepad" in Rotterdam. Willem and Dina Slier had ten children, of which six were killed during the war: Jacob en David, who still lived at home. And Abraham, Michiel, Leentje …
These persons are listed as residing at the same address. The source does not provide information about how they were related to one another.
In addition, a Jokos file (number 61536) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods…