Media appendix 6 May 2022 Image for Maurits Charles van Messel By: Ruth Wassynger Hedwig Rebecka van Messel-Marx (2); her husband, Maurits Charles van Messel (1); and two boys, possibly their sons Robert (second from left) and Hans, in 1929. (source: conam.info) With: Robert Charles van Messel, Hans Maurits van Messel, Maurits Charles van Messel