Ioannes IV ( el, , ''Iōannēs D΄'') may refer to:
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Patriarch John IV of Constantinople
John IV (died September 2, 595), also known as John Nesteutes (, Ioannes the Faster), was the 33rd bishop or Patriarch of Constantinople (April 11, 582 – 595). He was the first to assume the title '' Ecumenical Patriarch''. He is regarded as ...
(died in 595)
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John IV, Archbishop of Ohrid (c. 1088 – 1163/64)
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John IV Laskaris
John IV Doukas Laskaris (or Ducas Lascaris) ( el, Ἰωάννης Δούκας Λάσκαρις, ''Iōannēs Doukas Laskaris'') (December 25, 1250 – c. 1305) was emperor of Nicaea from August 16, 1258, to December 25, 1261. This empire was one ...
(1250–c. 1305)
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John IV Megas Komnenos (c. 1403–1459), emperor of Trebizond
See also
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John IV (disambiguation) John IV may refer to:
* Patriarch John IV of Alexandria, Patriarch between 569 and 579
* John IV of Armenia, Catholicos of Armenia between 833 and 855
* John IV of Constantinople (died 595), Patriarch from 582
* Pope John IV (died 642), Pope from 6 ...
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