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.
George William, Duke of Liegnitz traced back through the generations. George William, Duke of Liegnitz was the last legitimate male of the Piast dynasty. Descent before Mieszko I is partly fictional. This is the descent of the primary male heir. George William, Duke of Liegnitz George William (), also known as George IV William ; ; 29 September 1660 – 21 November 1675) was the last Silesian duke of Legnica and Brzeg from 1672 until his death. He was the last male member of the Silesian Piast dynasty descending from Władysław II the Exile (1105–1159). George William was the eldest but only surviving son of