789 deaths

Mauregatus the Usurper () was the king of Asturias from 783 to 788 or 789. He was an illegitimate son of Alfonso I, supposedly by a Moorish serf. He usurped the throne on the death of Silo, the husband of his half sister Adosinda, earning himself the nickname of the Usurper. The nobility had elected Alfonso II at Adosinda's insistence, but Mauregatus assembled a large army of supporters and forced Alfonso into exile in Álava.

Al-Khayzuran bint Atta () (died 789) was the wife of the Abbasid Caliph Al-Mahdi and mother of both Caliphs Al-Hadi and Harun al-Rashid. She maintained de facto influence from 775 to 789 during the reign of her husband and sons and is known for her immense influence on state affairs.

Willehad or Willihad (); 745 AD 8 November 789) was a Christian missionary and the Bishop of Bremen from 787 AD.

Italian noble

Uyghur Khanate's governing Khagan

Italian saint

Abbasid provincial governor (740–789)

Chinese chancellor

Hnabi or Nebi (c. 710 – c. 789) was an Alemannian duke. He was the son of Huoching and perhaps a grandson of Duke Gotfrid, which would make him a scion of the Agilolfing dynasty of Bavaria. He was the founder of the "old" line of the Ahalolfings. Around 724, he was one of the joint founders of the monastery of Reichenau.

Irish king

abbasid governor of Basra

Tang poet