John I

• First Epistle of John
• Jean I (disambiguation)
• Johann I (disambiguation)
• John (disambiguation)
• John 1
• John Chrysostom
• John I (bishop of Jerusalem)
• John I (exarch)
• John I Albert of Poland
• John I Doukas of Thessaly
• John I Orsini
• John I Tzimiskes
• John I of Alençon
• John I of Amalfi
• John I of Aragon
• John I of Avesnes
• John I of Bohemia
• John I of Brienne, Count of Eu
• John I of Castile
• John I of Dreux
• John I of France
• John I of Gaeta
• John I of Montferrat
• John I of Münsterberg
• John I of Naples
• John I of Nassau-Weilburg
• John I of Ponthieu
• John I of Portugal
• John I of Sweden
• John I of Trebizond
• John I, Count Palatine of Zweibrücken
• John I, Count of Blois
• John I, Count of Holland
• John I, Count of La Marche
• John I, Duke of Bavaria
• John I, Duke of Bourbon
• John I, Duke of Brabant
• John I, Duke of Brittany
• John I, Duke of Lorraine
• John I, Duke of Mecklenburg-Stargard
• John I, Duke of Opava-Ratibor
• John I, Duke of Saxony
• John I, Prince of Anhalt-Bernburg
• John II of Jerusalem
• John of Abkhazia
• John of Antioch
• John of Brienne
• John of Brunswick, Duke of Lüneburg
• John of Denmark
• John of England
• John of Islay, Lord of the Isles
• John of Saxony
• John of Scotland
• John, 6th Duke of Braganza
• John, Duke of Berry
• João I of Kongo
• Juan I (disambiguation)
• János Szapolyai
• King John (disambiguation)
• Pope John I
• Yohannes I of Ethiopia