Sipora Wertheim was a daughter of Jonas Wertheim and Rebecka Levij. She married in Amsterdam op 9 July 1919 to Jacob Fride, son of Herman Fride and Esther Nitka. The couple had three sons: Herman, Jonas and Esther Malka.
City Archive of Amsterdam, archive card of Jonas Wertheim and Jacob Fride .
In addition, Jokos files (numbers 52268, 50229, 54285) on this family or other family members are at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.