Died in 1381

Mar 23 Jan of Melsztyn a Polish nobleman.
Mar 24 Catherine of Vadstena Saint Catherine of Sweden, Katarina av Vadstena, Catherine of Vadstena or Katarina Ulfsdotter has been called the patron saint of protection against abortion and miscarriage. Her father was Ulf Gudmarsson, Lord of Ulvåsa, and her mother was Saint Birgitta
May 15 Eppelein von Gailingen a famous German robber baron in the Middle Ages.
May 21 Frederick III Landgrave of Thuringia the son of Frederick II, Margrave of Meissen and Mathilde of Bavaria.
Jun 14 Simon Sudbury Bishop of London from 1361 to 1375, Archbishop of Canterbury from 1375 until his death, and in the last year of his life Lord Chancellor of England.
Jun 15 John Cavendish an English judge from Cavendish, Suffolk, England. He and the village gave the name Cavendish to the aristocratic families, of the Dukedoms of Devonshire, Newcastle and Portland
Jun 15 Wat Tyler a leader of the 1381 Peasants' Revolt in England. He marched a group of protesters from Canterbury to the capital to oppose the institution of a poll tax. While the brief rebellion enjoyed early success, Tyler was killed by officers of King Richard II during negotiations at Smithfield in London
Jun 16 Siemowit III Duke of Masovia a prince of Masovia and a co-regent of the lands of Warsaw, Czersk, Rawa, Gostynin and other parts of Masovia.
Jul 15 John Ball (priest) an English Lollard priest who took a prominent part in the Peasants' Revolt of 1381.
Sep 28 Taddea Visconti an Italian noblewoman of the Visconti family, the ruling house in Milan from 1277 to 1447. She was the first wife of Stephen III, Duke of Bavaria, and the mother of the French queen Isabeau of Bavaria
Dec 2 John of Ruysbroeck one of the Flemish mystics. Some of his main literary works include The Kingdom of the Divine Lovers, The Twelve Beguines, The Spiritual Espousals, A Mirror of Eternal Blessedness, The Little Book of Enlightenment and The Sparkling Stone. Ruysbroeck also wrote letters and short sayings from some of his oral talks have been recorded by certain of his disciples, such as Jan Van Leeuwan. He wrote in the Dutch vernacular, the language of the common people of the Low countries, rather than in Latin, the language of the Church liturgy and official texts, so as to reach a wider audience
Dec 27 Edmund Mortimer 3rd Earl of March son of Roger Mortimer, 2nd Earl of March, by his wife Philippa, daughter of William Montagu, 1st Earl of Salisbury and Catherine Grandison.