Died in 1253

Jan 1 Marino Morosini the 44th doge of Venice. He governed from 1249 to 1253
Jan 18 Henry I of Cyprus King of Cyprus from 1218 to 1253. He was the son of Hugh I of Cyprus and Alice of Champagne of Jerusalem. When his father Hugh I died on January 10, 1218, the 8-month-old Henry became king. His mother was the official Regent, but handed off the actual governing to her uncle, Philip of Ibelin. When Philip died, the effective regency passed to his brother, John of Ibelin, the Old Lord of Beirut
Jun 24 Amadeus IV Count of Savoy Count of Savoy from 1233 to 1253.
Jul 8 Theobald I of Navarre Count of Champagne from birth and King of Navarre from 1234. He was famous as a trouvère and Crusader, and was the first Frenchman to rule Navarre
Jul 22 Albert IV Count of Tyrol the last count of Tyrol from the House of the Tyrol, He was also Vogt of Trent and from 1210 also Vogt of Bolzano.
Aug 11 Clare of Assisi an Italian saint and one of the first followers of Saint Francis of Assisi. She founded the Order of Poor Ladies, a monastic religious order for women in the Franciscan tradition, and wrote their Rule of Life—the first monastic rule known to have been written by a woman. Following her death, the order she founded was renamed in her honor as the Order of Saint Clare, commonly referred to today as the Poor Clares
Sep 22 Dōgen a Japanese Zen Buddhist teacher born in Kyōto. He founded the Sōtō school of Zen in Japan after travelling to China and training under Rujing, a master of the Chinese Caodong lineage
Sep 23 Wenceslaus I of Bohemia King of Bohemia from 1230 to 1253.
Oct 9 Robert Grosseteste an English statesman, scholastic philosopher, theologian, scientist and Bishop of Lincoln. He was born of humble parents at Stradbroke in Suffolk. C. Crombie calls him "the real founder of the tradition of scientific thought in medieval Oxford, and in some ways, of the modern English intellectual tradition"
Nov 29 Otto II Wittelsbach Duke of Bavaria the Duke of Bavaria and Count Palatine of the Rhine. He was a son of Louis I and Ludmilla of Bohemia and a member of the Wittelsbach dynasty