- Mar 16 John Beaufort, 1st Earl of Somerset (b. 1373)
- May 3 Alexander V [Petros Philargi], Kreta's Pope (1409-10), dies
- May 18 Rupert, King of Germany (1400-10), dies at 58
- May 31 King Martin I of Aragon (b. 1356)
- Jul 15 Ulrich von Jungingen, German Grand Master of the Teutonic Knights, killed at the Battle of Grunwald (b. 1360)