Otto von Habsburg (born 20 November 1912 as Archduke Franz Joseph Otto Robert Maria Anton Karl Max Heinrich Sixtus Xavier Felix Renatus Ludwig Gaetan Pius Ignatius of Austria, later of Austria-Este) was the head of the House of Habsburg and heir to the thrones of the former Austria-Hungary, now Austria, Hungary, Czech Republic, Croatia, Slovenia, Slovakia and Bosnia and Herzegovina. He could theoretically also be seen as heir to Poland, as well as the defunct Kingdom of Germany and the old Holy Roman Empire. He is the former Crown Prince (1916–1918) of Austria, Bohemia, Croatia and the nominal King of Hungary, from 1922 to 1946 when he was formally deposed by the communists when Hungary became a republic. He has been the Habsburg pretender to the Austrian throne since 1922. Otto is the eldest son of Charles, the last Emperor of Austria and King of Hungary, and his wife, Zita of Bourbon-Parma. He is a former member of the European Parliament for the Christian Social Union of Bavaria (CSU) party and honorary president of the International Paneuropean Union. He also influenced the creation of the Black-Yellow Alliance.
Otto lives in Bavaria in Germany, and is a citizen of Germany, Austria, Croatia and Hungary. Although his official name in Germany is Otto von Habsburg, he is referred to as Otto Habsburg-Lothringen by Austrian authorities, since the use of noble titles and prepositions like "von" is forbidden by the Austrian constitution. He is sometimes known as Archduke Otto of Austria, Crown Prince Otto of Austria, and in Hungary simply as Habsburg Ottó.
Alternate versions of Otto have been discovered in the multiverse:
- Otto I, former Emperor of Austria and Apostolic King of Hungary (Central Victory)
- Otto I, First Emperor of the Germans (Cold Phoney War)
- Otto I, Emperor of the Austro-Hungarian Empire and King of Hungary (The Kaiser's New Clothes)