Clara Frankfort was a daughter of Jacob Frankfort and Naatje Degen. Two other children from this family survived the war. Stadsarchief Amsterdam, archiefkaart Naatje Degen
In addition, a Jokos file (number 11543) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.