Grietje Plas was a daughter of Jacob Plas and Judith van Kam. She married Juda Wertheim in 1904. The couple divorced in 1934.
Stadsarchief Amsterdam, archiefkaart Grietje Plas
Grietje Plas was the mother of Judith Wertheim.
Genlias
In addition, a Jokos file (number 14474) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.