Sara van Cleef was a daughter of Jacob van Cleef and Esther Zoute. She married on 25 March 1936 in Amsterdam to Jacob Groenteman, who survived the Holocaust.
City Archive of Amsterdam, archive card of Sara van Cleef.
In addition, a Jokos file (number 14651) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.