There is a list in the archive of the Zentralstelle für jüdische Auswanderung with names of employees of the Joodse Raad (Jewish Council) who possibly could be qualified for a "Sperre".
On this list, the name of Hijman van Kleef occurs.
Archive Höhere SS-und Polizeiführer NIOD 77-1429 .
According to a list with shops of Jewish owners, compiled by the Amsterdam police in 1940, this family had a tobacco shop at the address Jodenbreestraat 99 in Amsterdam.
Abstracts of the police archives which are currently at the Amsterdam municipal archives