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• Jabal Druze: Archontology
• Jabal Druze: Governors: 1921-1937
• Jabal Druze: Polity Style: 1922-1936
• Jackson, Andrew
• Jamaica: Archontology
• Jamaica: Governors-General: 1962-2021
• Jamaica: Heads of State: 1962-2021
• Jamaica: Polity Style: 1962-2021
• James I (England)
• James I (Scotland)
• JAMES II
• James II (Scotland)
• James III (Scotland)
• James IV (Scotland)
• James V (Scotland)
• James VI (Scotland)
• James VII (Scotland)
• James VIII (Scotland)
• Janaev, Gennadij
• JANE (Jane Grey)
• Jansen, Ernest George
• Japan: Archontology
• Japan: Emperors (Claimants of the Northern Court): 1331-1392
• Japan: Emperors: 1392-2021
• Japan: Emperors: 593-984
• Japan: Emperors: 984-1392
• Japan: Notes
• Japan: Polity Style: 1392-2021
• Japan: Sources
• JAUCOURT, Arnail-François de
• Jay, John
• Jeanbon, André
• Jefferson, Thomas
• Johann, Archduke of Austria
• JOHN (Lackland)
• Johnson, Andrew
• Johnson, Lyndon
• Jonas, Franz
• Jordan: Archontology
• Jordan: Heads of State: 1923-2021
• Jordan: Polity Style: 1923-2021
• Jordan: Sources
• José I Napoleón (Bonaparte, Joseph)
• João VI (Dom João)
• Juan Carlos I

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