Otto II generally refers to Otto II, Holy Roman Emperor . It may also refer to:
Otto II may also refer to:
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The House of Wittelsbach is a European royal family and a German dynasty from Bavaria.
Philip of Swabia was a prince of the House of Hohenstaufen and king of Germany from 1198 to 1208. In the long-term struggle for the German throne upon the death of Emperor Henry VI between the Hohenstaufen and Welf dynasties, he was the first German king to be assassinated.
The House of Welf is a European dynasty that has included many German and British monarchs from the 11th to 20th century and Emperor Ivan VI of Russia in the 18th century.
John, a member of the House of Welf, was Duke of Brunswick-Lüneburg from 1252 until his death. He initially reigned jointly with his brother, Albert the Tall, until the partition of the duchy in 1269, when John became the first ruler of the newly created Principality of Lüneburg.
Berthold IV, a member of the House of Andechs, was Margrave of Istria and Carniola. By about 1180/82 he already bore the title of Duke of Merania, that is, the Adriatic seacoast of Dalmatia and Istria.
Otto I (912–973), known as Otto the Great, was German king from 936 and Holy Roman Emperor from 962 to 973.
Otto III, a member of the House of Andechs, was Count of Burgundy from 1231 and last Duke of Merania from 1234 until his death.
Otto I, a member of the House of Andechs, was Duke of Merania from 1204 until his death. He was also Count of Burgundy from 1208 to 1231, by his marriage to Countess Beatrice II, and Margrave of Istria and Carniola from 1228 until his death.
Conrad I was the Duke of Merania from 1152 until his death. Thitherto he had been the advocate of St Andreas at Freising since 1150 and Count of Dachau from 1152.
Berthold III, a member of the Bavarian House of Andechs, was Margrave of Istria from 1173 until his death.
Henry I, Duke of Brunswick-Lüneburg, called the Admirable, a member of the House of Welf, was the first ruler of the Principality of Grubenhagen from 1291 until his death.
Otto IV may refer to:
Matilda of Brandenburg, a member of the House of Ascania, was first Duchess consort of Brunswick-Lüneburg from 1235 to 1252 by her marriage with the Welf duke Otto the Child.
Otto III, Duke of Brunswick-Lüneburg was Prince of Lüneburg from 1330 to 1352.
William II, Duke of Brunswick-Lüneburg was the Prince of Lüneburg from 1330 to 1369.
Albert II, Duke of Brunswick-Lüneburg, was a Prince of Grubenhagen; he reigned from 1440 until his death in 1485.
The Duchy of Merania was a fiefdom of the Holy Roman Empire from 1152 until 1248. The dukes of Merania were recognised as princes of the Empire enjoying imperial immediacy at a time when these concepts were just coming into use to distinguish the highest ranks of imperial nobility.