- Jan 5 John Montacute, 3rd Earl of Salisbury, English politician (executed) (b. ca. 1350)
- Jan 7 Thomas Holland, 1st Duke of Surrey, English politician (b. 1374)
- Jan 16 John Holland, 1st Duke of Exeter, English politician, executed at around 47 or 48 after the failure of the Epiphany Rising conspiracy against King Henry IV
Richard II (1367-1400)
Feb 14 king of England (1377-99), murdered at age 33 at Pontefract Castle
- Mar 24 Florens Radewijns, Dutch priest/leader Modern Devotion, dies
Geoffrey Chaucer (c. 1340s-1400)
Oct 25 English poet and author of "The Canterbury Tales", dies at 56 or 57
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide