Bertha Koppel was a daughter of Jacob Koppel and Jozina Frijda. She married Isaak Wolf in 1908 in Zutphen.
Addition of a visitor of the website
In addition, a Jokos file (number 7126) on this person is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.