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.
William II, Duke of Brunswick-Lüneburg daughter of Duke Eric II of Saxe-Lauenburg. William II, Duke of Brunswick-Lüneburg William II, Duke of Brunswick-Lüneburg (about 1300 – 1369) was the Prince of Lüneburg from 1330 to 1369. William was born around the year 1300 as the fourth child of Otto the Strict and his wife, Matilda of Bavaria.<br> On his father's death, William took over the reins of state jointly with his brother Otto III. This was against his father's will because Otto II had wanted the state to be divided after his death. The focus of the brothers' reign in the early years was the territorial