Portal:Belgium/Anniversaries/May/May 31
- 1417: death of William II, Duke of Bavaria-Straubing, Count of Hainaut
- 1472: birth of Érard de La Marck (pictured), prince-bishop of the Prince-Bishopric of Liège
- 1960: death of Willem Elsschot, writer, best known for Villa des Roses, Lijmen/Het been, and Kaas
- 1973: birth of Dominique Monami, tennis player, winner of the bronze medal at the 2000 Summer Olympics in Sydney