Meijer van Cleef, a son of Emanuel van Cleef and Hadassa Wolff, married Clara Ossendrijver in Amsterdam on 18 January 1939, a daughter of Samuel Ossendrijver and Sara Zwart.
City Archive of Amsterdam, archive card of Meijer van Cleef and Samuel Ossendrijver .
In addition, a Jokos file (number 3902) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.