Alan IV, Duke of Brittany of William the Bastard, Duke of Normandy (later to become known as William the Conqueror) support of rebels in Brittany against Alan's maternal uncle, Conan II. Conan II died in late 1066 during a campaign in Anjou, and was succeeded by Alan's parents, Conan's sister Hawise and her husband Hoel II. Hoel ruled as regent from Hawise's death in 1072 until Alan reached his majority in 1084. To prevent further hostilities during his invasion of England, William I married his daughter Constance to the new duke Alan in 1087. The marriage ceremonies may have taken place in Bayeux in Normandy.
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