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.
William Hamilton, 11th Duke of Hamilton William Hamilton, 11th Duke of Hamilton William Alexander Archibald Hamilton, 11th Duke of Hamilton and 8th Duke of Brandon (19 February 1811 – 8 July 1863) styled Earl of Angus before 1819 and Marquess of Douglas and Clydesdale between 1819 and 1852, was a Scottish nobleman and the Premier Peer of Scotland. He was the son of Alexander Hamilton, 10th Duke of Hamilton and Susan Euphemia Beckford, daughter of English novelist William Beckford. He was educated at Eton and Christ Church, Oxford. He was Knight Marischal of Scotland from 1846 and Lord Lieutenant of Lanarkshire from 1852 until his death.