Izak de Vries was a son of Jonas de Vries and Sara de Leeuw. He married in Amsterdam on 30 November 1904 to Marianne van Colle, born in 1865 in Amsterdam as daughter of Aaron Isaac van Colle and Belia Brink. Marianne however passed away on 17 April 1938. The couple had two children: Jonas and Arnold.
City Archive of Amsterdam, archive card of Izak de Vries and website www.wiewaswie.nl.
Biography