Duke of Normandy as the reign of William II (1035–87), the ruler of Normandy could style himself "prince and duke, count of Normandy" as if unsure what his title should be. The literal Latin equivalent of "Duke of Normandy", "dux Normanniae", was in use by 1066, but it did not supplant "dux Normannorum" until the Angevin period (1144–1204), at a time when Norman identity was fading. Richard I experimented with the title "marquis" ("marchio") as early as 966, when it was also used in a diploma of King Lothair. Richard II occasionally used it, but he seems to have preferred the title duke.
Augustus William, Duke of Brunswick-Lüneburg Augustus William, Duke of Brunswick-Lüneburg Augustus William (; 8 March 1662 – 23 March 1731), a member of the House of Welf, was Duke of Brunswick-Lüneburg and ruling Prince of Wolfenbüttel from 1714 until his death. Augustus William was the third, but eldest surviving son of Duke Anthony Ulrich and his consort Elizabeth Juliane, a daughter of Duke Frederick of Schleswig-Holstein-Sønderburg-Norburg. Unlike his father, the young prince was not interested in politics; he studied at the University of Geneva from 1677 to 1678 and afterwards went on a "Grand Tour" from Switzerland to France and the Netherlands. Nevertheless, in 1681