Clara Vierra was a daughter of David Vierra and Mietje Poppegaai. She married in Amsterdam on 28 September 1932 to Joseph Degen, son of Levie Degen and Rebecca Prins. website www.wiewaswie.nl.
In addition, a Jokos file (number 50993) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.