Gerrit Abrahams and Betje Wolf married in 1913 in Monnickendam. They had two children, among whom Judith. Their last address was Muiderstraat 4a I in Amsterdam.
Stadsarchief Amsterdam, archiefkaart Gerrit Abrahams
In addition, a Jokos file (number 005207) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.