Died in 1241

Jan 3 Hermann II Landgrave of Thuringia the Landgrave of Thuringia and the son of Louis IV, Landgrave of Thuringia, and Saint Elizabeth of Hungary.
Mar 28 Valdemar II of Denmark the King of Denmark from 1202 until his death in 1241. The nickname Sejr is a later invention and was not used during the King's own lifetime. Sejr means victory in Danish
Apr 9 Henry II the Pious Duke of Silesia at Wrocław and Duke of Kraków and thus High Duke of all Poland as well as Duke of Southern Greater Poland from 1238 until his death. During 1238–1239 he also served as a regent of two other Piast duchies: Sandomierz and Upper Silesian Opole-Raciborz
May 26 Roger-Bernard II Count of Foix the sixth count of Foix from 1223 until his death. He was the son and successor of the illustrious count Raymond-Roger and his wife Philippa of Montcada
Jun 24 Ivan Asen II of Bulgaria English sometimes known as John Asen II, ruled as Emperor of Bulgaria from 1218 to 1241, during the Second Bulgarian Empire.
Aug 22 Pope Gregory IX Pope from 19 March 1227 to his death in 1241. He is known for instituting the Papal Inquisition, a mechanism that severely punished people accused of heresy, in response to the failures of the episcopal inquisitions established during the time of Pope Lucius III through his papal bull Ad abolendam issued in 1184
Sep 23 Snorri Sturluson an Icelandic historian, poet, and politician. He was elected twice as a lawspeaker at the Icelandic parliament, the Althing. He was the author of the Prose Edda or Younger Edda, which consists of Gylfaginning , a narrative of Norse mythology, the Skáldskaparmál, a book of poetic language, and the Háttatal, a list of verse forms. He was also the author of the Heimskringla, a history of the Norwegian kings that begins with legendary material in Ynglinga saga and moves through to early medieval Scandinavian history. For stylistic and methodological reasons, Snorri is often taken to be the author of Egil's saga
Sep 26 Fujiwara no Teika a Japanese poet, critic, calligrapher, novelist, anthologist, scribe, and scholar of the late Heian and early Kamakura periods. His influence was enormous, and he is even to this day counted as among the greatest of Japanese poets, and perhaps the greatest master of the waka form – an ancient poetic form consisting of five lines with a total of 31 syllables
Nov 10 Pope Celestine IV Pope from 25 October 1241 to his death in 1241.
Dec 1 Isabella of England an English princess and, by marriage, Holy Roman Empress, German Queen, and Queen consort of Sicily.
Dec 11 Ögedei Khan the third son of Genghis Khan and second Great Khan of the Mongol Empire, succeeding his father. He continued the expansion of the empire that his father had begun, and was a world figure when the Mongol Empire reached its farthest extent west and south during the invasions of Europe and Asia. Like all of Genghis' primary sons, he participated extensively in conquests in China, Iran, and Central Asia. He was given the temple name of Taizong later by his nephew Kublai Khan, who founded the Yuan Dynasty