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.
Adolphe, Grand Duke of Luxembourg Adolphe, Grand Duke of Luxembourg Adolphe (Adolf Wilhelm August Karl Friedrich; 24 July 1817 – 17 November 1905) was the last sovereign Duke of Nassau, reigning from 20 August 1839 until the duchy's annexation to Kingdom of Prussia in 1866. In 1890, he became Grand Duke of Luxembourg following the death of King William III of the Netherlands, ending the personal union between the Netherlands and Luxembourg, until his own death in 1905. He was the first monarch of Luxembourg from the House of Nassau-Weilburg. Adolphe became Duke of Nassau in August 1839, following the death of his father William.