John VIII may refer to: * Pope John VIII, Pope from 872 to 882 *

Antipope John VIII Antipope John VIII or Antipope John was an antipope of the Roman Catholic church, in the year 844. On the death of Pope Gregory IV (25 January 844), the populace of Rome declared John, a deacon with no known links to the aristocracy as his succe ...

, antipope in 844 * John VIII bar Abdoun, Syriac Orthodox Patriarch of Antioch (944-1033) * John VIII of Constantinople, Patriarch of Constantinople (1010-1075) * John VIII Palaiologos, Byzantine Emperor (1392–1448) *

John VIII, Count of Harcourt Jean VIII of Harcourt (9 April 1396 – 17 August 1424, Battle of Verneuil) was a count of Aumale. He was the son of John VII of Harcourt, count of Harcourt, and of Marie of Alençon, a "princess of the blood". Life He fought the English at the ...

, 1398–1424 *

John VIII, Count of Vendôme John VIII de Bourbon (1425 – 6 January 1478) was Count of Vendôme from 1466 until his death. A member of the House of Bourbon, he was the son and successor of Louis, Count of Vendôme. As a courtier of King Charles VII of France, he fought th ...

, 1426–1477 * John VIII, Archbishop of Antivari, d. 1571 *

John VIII, Count of Nassau-Siegen John VIII, Count of Nassau-Siegen (''Jan'' or ''Johan''; Dillenburg, 29 September 1583 – Ronse, 27 July 1638) was a German nobleman and militarist of the 17th century. Life John VIII, Count of Nassau-Siegen, Katzenelnbogen, Vianden and ...

, 1583–1638 * The mythical Pope Joan, in some versions of her legend

See also