Coenraad (Coenie) Hartog de Vries was a son of H. L. de Vries, founder of a drapery shop. Before the war Coenraad worked as a clerk on the post office in Scheveningen.
D. van Zomeren, Geschiedenis van de joodse gemeenschap in Weesp (Weesp 1983) 74-76
Coenraad Hartog de Vries was a secretary of Friedrich Weinreb for while.
His relationship with Weinreb was severely damaged in the end.
Het Weinreb rapport (Den Haag 1976) 96-99