Addition

Isaäc Jas and his family

Isaäc Jas and Sara Aron Beek married in 1913.
Stadsarchief Amsterdam, archiefkaart Sara Aron Beek

In addition, a Jokos file (number 15028) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.