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 FitzRoy, 3rd Duke of Cleveland and Common Pleas, and Comptroller of the Seal and Green Wax Offices. The dukedom became extinct upon his death; however, it was recreated for his grand-nephew William Vane, 1st Duke of Cleveland. William FitzRoy, 3rd Duke of Cleveland William FitzRoy, 3rd Duke of Cleveland, 2nd Duke of Southampton (19 February 1698 – 18 May 1774) was an English nobleman, styled Earl of Chichester from birth until 1730. In 1730, he succeeded his father Charles as Duke of Southampton, Duke of Cleveland and Chief Butler of England. In 1731, he married Lady Henrietta Finch, the daughter of Daniel Finch, 2nd Earl