Hartog van Kleef was a son of Meijer van Kleef and Margaretha Rood. He married Grietje Polak in 1910 in Amsterdam. She passed away in 1931. They had three children. He remarried in 1932 to Anna Legerman.
Stadsarchief Amsterdam, archiefkaart Hartog van Kleef
The children of Hartog van Kleef survived…
In addition, a Jokos file (number 6154) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.