Sara Soesan was a daughter of Ruben Soesan and Rachel Kat. She married 22 January 1925 in Amsterdam to Lajzer Prozer, son of Herszko Prozer and Sura Monowicz.
City Archive of Amsterdam, family registration card of Ruben Soesan and website www.wiewaswie.nl .
In addition, a Jokos file (number 10920) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.