- Feb 25 Dafydd ap Llywelyn, King of Gwynedd, 1st to take name Prince of Wales, dies at about 33
- May 31 Isabella of Angouleme, queen of John of England
- Jun 15 Frederik II "the Strijdbare", duke of Austria, dies in battle at 25
- Jun 16 Lutgardis/Ludgardis, Flemish mystic/saint, dies at about 64
- Sep 20 Mikhail of Chernigov, ruler of Kiev
- Sep 30 Yaroslav II of Russia, Grand Prince of Vladimir (1238-46), dies at 55
- Nov 8 Berenguela of Castile, wife of Alfonso IX of Castile (b. 1180)