Branca Soep married Nathan Joel van Coevorden in 1916. They got divorced on 6 November 1931. The couple had three children. Stadsarchief Amsterdam, archiefkaart Branca Soep
In addition, a Jokos file (number 363) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.