List of Famous people named Duke

Friedrich of Saxe-Altenburg was a member of the Ernestine branch of the House of Wettin and a Duke of Saxe-Altenburg and Duke of Jülich-Cleves-Berg. Friedrich is sometimes called "Friedrich the younger" to distinguish him from Prince Frederick of Saxe-Weimar, as they were both called "Friedrich of Saxe-Weimar".

Duke Peter Frederick George of Oldenburg was a younger son of Peter I, Grand Duke of Oldenburg and his wife Duchess Frederica of Württemberg. He was a son-in-law of Paul I of Russia through marriage to his daughter Grand Duchess Catherine Pavlovna of Russia. He was referred to as a prince in Russia, Prince Georgy Petrovich Oldenburgsky.

Duke Ludwig Wilhelm Karl Norbert Theodor Johann in Bavaria was a member of the Kingdom of Bavaria's ruling dynasty, the House of Wittelsbach. From 1909 he was the head of the Wittelsbachs' cadet branch, the Dukes in Bavaria, heirs of the Counts Palatine of Birkenfeld-Gelnhausen.

Duke Wilhelm in Bavaria, full German name: Wilhelm, Herzog in Bayern was Count Palatine of Birkenfeld-Gelnhausen between 1789 and 1799 and first Duke in Bavaria from 16 February 1799 until his death in 1837. From 17 December 1803 to 20 March 1806, Wilhelm was titled Duke of Berg. Wilhelm was a great-grandfather of Empress Elisabeth of Austria through his son Duke Pius August in Bavaria.

Duke Alexander of Württemberg was a member of the dynasty which ruled the German kingdom of Württemberg. To marry a daughter of the French king he agreed that their children would be raised in their mother's faith, thereby becoming ancestor of the Roman Catholic branch of his family.

Duke Otto Henry of Brunswick-Lüneburg-Harburg, was a member of House of Guelph and the heir apparent of Brunswick-Lüneburg-Harburg.

Anton Gunther Friedrich Elimar was a duke of Oldenburg.

Duke Friedrich Paul Wilhelm of Württemberg was a member of the House of Württemberg and a Duke of Württemberg. Paul Wilhelm was a German naturalist and explorer, who in the early 19th century, undertook several expeditions in North America, North Africa, and Australia. In 1829, he discovered the sources of the Missouri River.

Duke Pius August in Bavaria, full German name: Pius August Herzog in Bayern was a Duke in Bavaria as a member of the Palatine Birkenfeld-Gelnhausen line of the House of Wittelsbach. Pius August was a grandfather of Empress Elisabeth of Austria through his son Duke Maximilian Joseph in Bavaria, as well as a great grandfather of Queen Elisabeth of the Belgians and an ancestor of the current generations of the Belgian and Italian Royal Families and the Grand Ducal Family of Luxembourg.

Klemens Franz de Paula, Prince of Bavaria was the son of the Imperial Field Marshal, Ferdinand of Bavaria (1699–1738), and the grandson of Maximilian II Emanuel, Elector of Bavaria.