So in 1907, William declared the Counts of Merenberg non-dynastic, naming his own eldest daughter Marie-Adélaïde (1894–1924) as heir presumptive to the grand ducal throne. She became Luxembourg's first reigning grand duchess upon her father's death in 1912, and upon her own abdication in 1919, was succeeded by her younger sister Charlotte (1896–1985).
William I (Willem Frederik, Prince of Orange-Nassau; 24 August 1772 – 12 December 1843) was a Prince of Orange, the King of the Netherlands and Grand Duke of Luxembourg. He was the son of the last Stadtholder of the Dutch Republic , who went into exile to London in 1795 because of the Batavian Revolution .
In 1814, William was briefly engaged to Princess Charlotte of Wales, only child of the Prince Regent (later George IV of the United Kingdom) and his estranged wife, Caroline of Brunswick. The engagement was arranged by the Prince Regent, but it was broken off because Charlotte's mother was against the marriage and because Charlotte did not want to move to the Netherlands.
Grand Duke Henri is a member of the International Olympic Committee (IOC), a member of The Mentor Foundation (established by the World Health Organization) and a director of the Charles Darwin Trust for the Galápagos Islands. The grand duke lives with his family at Berg Castle in Luxembourg.
William III (Dutch: Willem Alexander Paul Frederik Lodewijk; English: William Alexander Paul Frederick Louis; 19 February 1817 – 23 November 1890) was King of the Netherlands and Grand Duke of Luxembourg from 1849 until his death in 1890.
He is the father of Adolphe, Grand Duke of Luxembourg, and Queen Sophia of Sweden and Norway, consort of King Oscar II and a 3rd cousin of William III of the Netherlands, who left a surviving daughter to rule his main realm, but the crown of Luxembourg went through the male line, looking to 17 generations back, to pass to the Duke of Nassau and then his descendants.
Marie-Adélaïde was born on 14 June 1894 in Berg Castle as the eldest child of Grand Duke William IV and his wife, Marie Anne of Portugal.. Since her father had six daughters and no sons, he proclaimed Marie-Adélaïde as the heir presumptive on 10 July 1907, in order to solve any succession crisis due to the use of Salic law in the monarchy.