Baron Willem van Dedem, also styled as Willem, Baron van Dedem, (1929–2015) was a Dutch businessman, art collector, art historian and philanthropist. He donated artworks to the National Gallery in London, the Rijksmuseum and the Mauritshuis.
- Occupation
- businessperson, art collector
- Citizenship
- Kingdom of the Netherlands
- Born
- 1929
- Died
- 2015
