Born in 1350

Jan 23 Vincent Ferrer a Valencian Dominican friar, who gained acclaim as a missionary and a logician. He is honored as a saint of the Roman Catholic Church
Apr 13 Margaret III Countess of Flanders the last Countess of Flanders of the House of Dampierre, Countess of Artois and Countess Palatine of Burgundy and twice Duchess consort of Burgundy.
Jun 27 Manuel II Palaiologos Byzantine Emperor from 1391 to 1425. Shortly before his death he was tonsured a monk and received the name Matthew. He is commemorated on July 21
Oct 12 Dmitry Donskoy Saint Dmitry Ivanovich Donskoy , or Dmitry of the Don, sometimes referred to simply as Dmitry , son of Ivan II the Meek of Moscow , reigned as the Prince of Moscow from 1359 and Grand Prince of Vladimir from 1363 to his death. He was the first prince of Moscow to openly challenge Mongol authority in Russia. His nickname, Donskoy , alludes to his great victory against the Tatars in the Battle of Kulikovo which took place on the Don River. He is venerated as a Saint in the Orthodox Church with his feast day on 19 May
Nov 19 Raoul II of Brienne Count of Eu the son of Raoul I of Brienne, Count of Eu and Guînes and Jeanne de Mello. He succeeded his father in 1344 as Count of Eu and Guînes, as well as in his post as Constable of France
Nov 25 Katherine Swynford the third wife of John of Gaunt, Duke of Lancaster, a son of King Edward III. She had been the Duke's lover for many years before their marriage. The couple's children, born before the marriage, were later legitimated during the reign of the Duke's nephew, Richard II, although with the provision that not they nor their descendants could ever claim the throne of England
Dec 26 Jean de Marigny a younger brother of Enguerrand de Marigny.
Dec 27 John I of Aragon the King of Aragon from 1387 until his death.