John VIII may refer to: Pope John VIII, Pope from 872 to 882 Antipope John VIII, antipope in 844 John VIII bar Abdoun, Syriac Orthodox Patriarch of Antioch (944–1033) John VIII of Constantinople, Patriarch of Constantinople (1010–1075) Pope John VIII of Alexandria, Coptic Pope from 1300 to 1320 John VIII Palaiologos, Byzantine Emperor (1392–1448) John VIII, Count of Harcourt, 1398–1424 John VIII, Count of Vendôme, 1426–1477 John VIII, Archbishop of Antivari, d. 1571 John VIII, Count of Nassau-Siegen, 1583–1638 The mythical Pope Joan, in some versions of her legend
See also John 8, the eighth chapter of the Gospel of John