Died in 1290

Jan 28 Dervorguilla of Galloway a 'lady of substance' in 13th century Scotland, the wife from 1223 of John, 5th Baron de Balliol, and mother of John I, a future king of Scotland.
Feb 3 Henry XIII Duke of Bavaria Duke of Lower Bavaria. As Duke of Lower Bavaria, he is also called Henry I
Apr 26 Gaston VII Viscount of Béarn the twentieth Viscount of Béarn from 1229. He was the son and heir of Guillermo II de Montcada and Garsenda, daughter of Alfonso II of Provence and Garsenda of Forcalquier. He was succeeded by Roger Bernard III of Foix
May 10 Rudolf II Duke of Austria Duke of Austria and Styria from 1282 to 1283, jointly with his elder brother Albert I, who succeeded him.
Jun 23 Henryk IV Probus a member of the Silesian branch of the royal Polish Piast dynasty. He was Duke of Silesia at Wrocław from 1266, and from also 1288 High Duke of the Polish Seniorate Province of Kraków until his death in 1290
Jul 10 Ladislaus IV of Hungary King of Hungary and Croatia from 1272 to 1290. His mother, Elizabeth was the daughter of a chieftain of the pagan Cumans who had settled in Hungary. At the age of eight, he married Elisabeth , a daughter of King Charles I of Sicily
Aug 24 Zavis of Falkenstein Czech nobleman. After the Czech king Ottokar II of Bohemia was killed in battle in 1278, a Brandenburg regent was installed. In 1284, when the regent was expelled Zavis of Falkenstein took his place at the head of local nobles along with bishop Tobias Bechun of Prague. He became second husband of Ottokar II's widow, Kunigunda of Slavonia in Prague in 1285. Kunigunda died only a few months later and Záviš married again to the Hungarian princess Elisabeth. He was executed on behalf of the King, Rudolph I of Germany, on 24 August 1290
Sep 26 Margaret Maid of Norway a Norwegian princess who reigned as Queen of Scots from 1286 until her death. Her death while traveling to Scotland sparked off the disputed succession which led to the Wars of Scottish Independence
Nov 28 Eleanor of Castile the first queen consort of Edward I of England. She was also Countess of Ponthieu in her own right from 1279 until her death in 1290, succeeding her mother and ruling together with her husband
Dec 18 Magnus III of Sweden King of Sweden from 1275 until his death in 1290.