Who was alive in 850?

305 well-known people were alive in 850, including Muḥammad ibn Musa al-Khwarizmi, Alfred the Great, Charles the Bald. Here are the 80 most notable:

Muḥammad ibn Musa al-Khwarizmi (780–850) — 9th-century Persian mathematician and astronomer
Alfred the Great (849–899) — king of Wessex (r. 872–901)
Charles the Bald (823–877) — King of West Francia from 843 to 877 and Carolingian Emperor from 875 to 877
Al-Kindi (801–870) — Muslim Arab philosopher, mathematician and physician (c.801–873)
Muḥammad ibn Ismaeel al-Bukhārī (810–870) — Persian Islamic scholar (810-870)
John VIII (820–882) — Head of the Catholic Church from 872 to 882
Adrian II (792–872) — pope
Leo IV (790–855) — pope of the Catholic Church
Formosus (816–896) — pope
Ahmad ibn Hanbal (780–855) — Muslim jurist and theologian (780–855)
Benedict III (810–858) — pope (810-858)
Marinus I (830–884) — pope
Nicholas I (820–867) — pope
John IX (840–900) — pope
Anastasius III (801–) — pope
Theodore II (840–897) — pope (840-897)
Charles the Fat (839–888) — Emperor of the Carolingian Empire (839-888) (r. 881-887)
Rurik (830–879) — Varangian chieftain (c. 830-879)
Muslim ibn al-Ḥajjāj (821–875) — Arab Muslim hadith scholar (821–875)
Lothair I (795–855) — Emperor of the Carolingian Empire from 817 to 855
Muhammad ibn Jarir al-Tabari (839–922) — Iranian scholar, historian and commentator on the Qur'an (839–923)
Oleg the Wise (845–912) — prince of Kiev
Johannes Scotus Eriugena (800–877) — Irish Catholic philosopher and theologian (c. 800 – c. 877)
Louis the German (806–876) — King of East Francia from 843 to 876
Arnulf of Carinthia (850–899) — king of East Francia
Basil I (811–886) — Byzantine emperor from 867 to 886
Ragnar Lodbrok (801–850) — legendary king of Denmark and Sweden
Louis the Stammerer (846–879) — King of West Francia from 877 to 879
Al-Jahiz (775–868) — Arabic writer (776–869)
Louis II of Italy (825–875) — Ruler of the Holy Roman Empire from 844 to 875
Abbas Ibn Firnas (810–887) — 9th century astronomer and physician
Photios I of Constantinople (820–900) — 9th Century Ecumenical Patriarch of Constantinople
Kenneth MacAlpin (810–858) — King of the Picts
Michael III (840–867) — Byzantine emperor from 842 to 867
Árpád (845–907) — Grand Prince of the Hungarians
Ingólfr Arnarson (848–910) — Viking settler of Iceland
Abd ar-Rahman II (792–852) — Emir of Cordoba from 822 to 852
Thābit ibn Qurra (836–901) — Mesopotamian astronomer and mathematician
Abu Isa at-Tirmidhi (825–892) — Islamic hadith scholar (824–892)
Æthelred I (847–871) — King of Wessex (r. 865–871)
Berengar I of Italy (840–924) — Holy Roman Emperor from 915 to 924
Domnall mac Ailpín (812–862) — King of the Picts from 858 to 862
Carloman of Bavaria (830–880) — King of Bavaria from 876 to 879
Áed mac Cináeda (840–878) — King of the Picts
Abu Dawud al-Sijistani (817–888) — 9th-century Persian Hadith compiler
Al-Mutawakkil (822–861) — 10th Abbasid caliph (822–861, r. 847–861)
Causantín mac Cináeda (836–876) — Scottish king
Al-Baladhuri (820–892) — Abbasid-era Muslim historian (820-892)
Boris I of Bulgaria (827–907) — Bulgarian ruler
Rabanus Maurus (780–856) — archbishop of Mainz and writer (d. 856)
Theodora (815–867) — 9th-century Byzantine empress, wife of Theophilos
Clement of Ohrid (840–916) — medieval Bulgarian scholar
Fatima al-Fihriya (800–880) — Legendary founder of the al-Qarawiyyin mosque
al-Yaʿqubi (801–905) — 9th-century Arab geographer and historian
Constantine II of Scotland (801–) — 10th-century king of Scotland (Alba)
Ibn Khordadbeh (820–912) — Persian geographer and official (died 913)
Æthelbald (835–860) — King of Wessex
Lothair II of Lotharingia (835–869) — King of Lotharingia from 855 to 869
Al-Mu'tamid (845–892) — Abbasid Caliph from 870 to 892
Hasan al-Askari (845–874) — eleventh of the Twelve Shia Imams
Ansgar (801–865) — missionary to Denmark and later Archbishop of Hamburg-Bremen
Ibn Majah (824–886) — Persian Hadith compiler (824–886)
Ali al-Hadi (829–868) — tenth of the Twelve Shia Imams (828–868)
Æthelberht (836–865) — King of Wessex
Budai (850–916) — figure in Buddhist and East Asian religious traditions
Du Mu (803–852) — Chinese calligrapher, poet and politician (803–852)
Kassia (810–865) — Byzantine abbess, poet, composer, and hymnographer
Ono no Komachi (825–900) — Japanese poet
Louis III the Younger (835–882) — King of East Francia
Abu Ma'shar al-Balkhi (787–886) — Persian astrologer and philosopher (787–886)
Álmos, Grand Prince of the Magyars (820–895) — kende or gyula of the Hungarians (fl. 9. century)
Al-Muhtadi (825–870) — 14th Abbasid Caliph (r. 869–870)
Ibn Qutaybah (828–889) — Persian jurist and scholar (c.828-889)
Al-Muntasir (838–862) — 11th Abbasid caliph from 861 to 862
Al-Nasa'i (829–915) — Persian Islamic scholar and collector of hadith (c.829–915)
Kōkō (830–887) — Emperor of Japan
Dhu'l-Nun al-Misri (796–860) — Sufi saint
Hunayn ibn Ishaq (808–873) — Arab Christian scholar, physician and scientist (809–873)
Muhammad I of Córdoba (823–886) — Emir of Córdoba from 852 to 886
Al-Mu'tazz (847–869) — Abbasid Caliph of Baghdad from 866 to 869

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