Otto I (disambiguation)

• Otto I
• Otto I (bishop of Freising)
• Otto I (bishop of Utrecht)
• Otto I of Austria
• Otto I of Bavaria
• Otto I of Greece
• Otto I, Count Palatine of Mosbach
• Otto I, Count of Burgundy
• Otto I, Count of Chiny
• Otto I, Count of Duras
• Otto I, Count of Guelders
• Otto I, Count of Nassau
• Otto I, Count of Oldenburg
• Otto I, Count of Salm
• Otto I, Count of Savoy
• Otto I, Count of Scheyern
• Otto I, Count of Scheyern-Dachau-Valley
• Otto I, Count of Schwerin
• Otto I, Duke of Bavaria
• Otto I, Duke of Brunswick-Göttingen
• Otto I, Duke of Brunswick-Harburg
• Otto I, Duke of Brunswick-Lüneburg
• Otto I, Duke of Carinthia
• Otto I, Duke of Merania
• Otto I, Duke of Pomerania
• Otto I, Duke of Saxony
• Otto I, Duke of Swabia and Bavaria
• Otto I, Landgrave of Hesse
• Otto I, Margrave of Brandenburg
• Otto I, Margrave of Hachberg-Sausenberg
• Otto I, Margrave of Meissen
• Otto I, Marquess of Montferrat
• Otto I, Prince of Anhalt-Aschersleben
• Otto II (disambiguation)
• Otto III (disambiguation)
• Otto IV (disambiguation)
• Otto V (disambiguation)
• Otto VI
• Otto VII (disambiguation)
• Otto VIII (disambiguation)