9th-century murdered monarchs

Byzantine emperor from 842 to 867

Byzantine emperor (lived 775–820)

Abū Mūsā Muḥammad bin Hārūn al-Amīn (; April 787 – 24/25 September 813), better known by just his laqab of al-Amīn (), was the sixth Abbasid caliph from 809 to 813.

Abū Isḥāq Muḥammad ibn Hārūn ibn Muḥammad ibn Hārūn al-Muhtadī bi-ʾLlāh (‎; – 21 June 870), better known by his regnal name al-Muhtadī bi-ʾLlāh (Arabic: , "Guided by God"), was the Caliph of the Abbasid Caliphate from July 869 to June 870, during the "Anarchy at Samarra".

Álmos (), also Almos or Almus ( 820 – 895), was—according to the uniform account of Hungarian chronicles—the first head of the "loose federation" of the Hungarian tribes from around 850. Whether he was the sacred ruler (kende) of the Hungarians or their military leader (gyula) is subject to scholarly debate. According to Constantine Porphyrogenitus, he accepted the Khazar khagan's suzerainty in the first decade of his reign, but the Hungarians acted independently of the Khazars from around 860. The 14th-century Illuminated Chronicle narrates that he was murdered in Transylvania at the beginnin

Abū al-ʿAbbās Aḥmad ibn Muḥammad al-Mustaʿīn bi-ʾllāh (; 836 – 17 October 866), better known by his regnal title al-Mustaʿīn, was the Abbasid caliph from 862 to 866, during the "Anarchy at Samarra". A grandson of Caliph al-Mu'tasim, he was installed on the throne by the Turkic military commanders following the death of al-Muntasir.

Tritsuk Detsen (), better known by his nickname Ralpachen (; 802–838), was the 40th King (Tsenpo) of Tibet from 815 to 838. He reigned after the death of his father, Sadnalegs, and grew the empire to its largest extent. He was murdered by his younger brother Langdarma in 838. Ralpachen is one of the "Three Dharma Kings of Tibet", and referred to as "son of God" in the ancient Tibetan chronicle Testament of Ba.

Gudfred was a ninth century Danish king who reigned from at least 804 to 810. Alternate spellings include Godfred (Danish), Göttrick (German), Gøtrik (Danish), Gudrød (Danish), and Godofredus (Latin). He stands at the threshold of the History of Denmark in the sense that he is the first ruler about whom there is substantial knowledge from contemporary sources. He waged offensive war against the Carolingian Empire with some success, but was murdered under murky circumstances before a major confrontation had taken place. There is no unambiguous trace of Gudfred in the later Norse sagas, and his

King of the Danes (813–854)

emperor of the Tang Dynasty

Ruler of Egypt and Syria from 884 to 896

King of Brittany

king of Northumbria

Italian prince

Erispoe (; ; died 2 or 12 November 857) was Duke of Brittany from 851 to his death. After the death of his father Nominoe, he led a successful military campaign against the Franks, culminating in his victory at the Battle of Jengland. He is subsequently referred to as "King of Brittany".

Italian noble

Italian noble

Prince of Benevento

Georgian prince

King of Abkhazia

Italian prince

khagan of Uyghurs

Ispahbadh of the Bavand dynasty

khagan of Uyghurs

King of Leinster