860s deaths

Abu Uthman Amr ibn Bahr al-Kinani al-Basri (; ), commonly known as al-Jahiz (, ), was an Arab Muslim theologian, intellectual, and litterateur known for his individual Arabic prose. A polymath who lived during the Abbasid Caliphate, he was the author of works of literature (including theory and criticism), theology, zoology, philosophy, grammar, dialectics, rhetoric, philology, linguistics, and politico-religious polemics. His extensive zoological work has been credited with describing principles related to natural selection, ethology, and the functions of an ecosystem.

Patriarch of Constantinople

Ratramnus (died ) was a Frankish monk of the monastery of Corbie, near Amiens in northern France, and a Carolingian theologian known best for his writings on the Eucharist and predestination. His Eucharistic treatise De corpore et sanguine Domini (On the Body and Blood of the Lord) was a counterpoint to his abbot Paschasius Radbertus’s realist Eucharistic theology. Ratramnus was also known for his defense of the monk Gottschalk, whose theology of double predestination was the center of much controversy in 9th-century France and Germany. In his own time, Ratramnus was perhaps best known for his

Frankish noble, daughter of Louis the Pious

king of Northumbria

mathematician

The son of Asad bin Saman and Amir of Ferghana (819–864)

Count of Parma

French count

Catalan count

Lombardi noble

Auisle or Óisle ( or ; died c. 867) was a Viking leader in Ireland and Scotland in the mid-late ninth century. He was the son of the king of Lochlann, identified in the non-contemporary Fragmentary Annals of Ireland as Gofraid, and brother of Amlaíb Conung and Ímar, the latter of whom founded the Uí Ímair dynasty, and whose descendants would go on to dominate the Irish Sea region for several centuries. Another Viking leader, Halfdan Ragnarsson, is sometimes considered a brother. The Irish Annals title Auisle, Ímar and Amlaíb "kings of the foreigners". Modern scholars use the title "kings of Du

Carolingian priest and scholar