1280s deaths

Jutta of Denmark also known as Judith (1246-1286/95) was a daughter of Eric IV of Denmark and his wife Jutta of Saxony. She was a younger sister of Sophia, Queen of Sweden and Ingeborg, Queen of Norway, as well as an older sister of Agnes, Duchess of Langeland. Jutta was also mistress for a brief period of time to her brother-in-law Valdemar, King of Sweden. Jutta was a member of the House of Estridsen.

Maud de Lacy, (25 January 1223 – 1287/10 March 1289), was an English noblewoman, being the eldest child of John de Lacy, 2nd Earl of Lincoln, and the wife of Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester.

Jacopo Dondulo (Italian: Giacomo Dondulo or Dandolo; fl.) was a Venetian sailor, military commander, and politician in the 13th century. He played a distinguished role in the naval conflicts of the War of Saint Sabas against the Republic of Venice, leading the Venetian navy to a crushing victory at the Battle of Trapani in 1266. He served also several tenures as a member of the Great Council of Venice, as Bailo of Negroponte in 1277–1279, and as Duke of Candia in 1281–1283, where he faced the start of the Revolt of Alexios Kallergis.

Orbász (II) from the kindred Báncsa (Hungarian: Báncsa nembeli (II.) Orbász; died after 1286) was a Hungarian clergyman in the 13th century. He was one of the first Hungarians, who obtained a doctorate of Roman law.

Matthew (II) from the kindred Csák (Hungarian: Csák nembeli (II.) Máté; Slovak: Matúš Čák II; Romanian: Matei Csáki al II-lea; c. 1235 – 1283 or 1284) was a powerful Hungarian baron, landowner and military leader, who held several secular positions during the reign of kings Béla IV, Stephen V and Ladislaus IV. He was the first notable member of the Trencsén branch of the gens ("clan") Csák. His nephew and heir was the oligarch Matthew III Csák, who, based on his uncles' acquisitions, became the de facto ruler of his domain independently of the king and usurped royal prerogatives on his territories.

Sixtus (Hungarian: Sükösd or Sike; died 1285 or 1286) was a Hungarian clergyman in the 13th century, who served as a skilled diplomat of King Béla IV of Hungary for decades.

Cavalcante de' Cavalcanti (flourished c. 1250; died c. 1280) was a Florentine Epicurean philosopher and father of Guido Cavalcanti, a close friend of Dante Alighieri.

William de La Mare (fl. 1272–1279) was an English Franciscan theologian.

Todros ben Joseph Abulafia (1225-ca. 1285) (Hebrew: ?????? ?? ???? ???????) was a nephew of Meir Abulafia and Chief Rabbi of Castile. He is the author of Otzar HaKavod, a mystical commentary on the Aggadah.