William IV, Grand Duke of Luxembourg

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William IV
Guillaume IV of Luxembourg.png
Grand Duke of Luxembourg
Reign 17 November 1905 – 25 February 1912
Predecessor Grand Duke Adolphe
Successor Grand Duchess Marie-Adélaïde
Spouse Infanta Marie Anne of Portugal
Issue Marie-Adélaïde, Grand Duchess of Luxembourg
Charlotte, Grand Duchess of Luxembourg
Hilda, Princess of Schwarzenberg
Antonia, Crown Princess of Bavaria
Elisabeth, Princess Ludwig Philipp of Thurn and Taxis
Sophie, Princess Ernst Heinrich of Saxony
House House of Nassau-Weilburg
Father Adolphe, Grand Duke of Luxembourg
Mother Princess Adelheid-Marie of Anhalt-Dessau
Born (1852-04-22)22 April 1852
Biebrich Palace, Wiesbaden
Died 25 February 1912(1912-02-25) (aged 59)
Berg Castle, Colmar-Berg
Burial Schlosskirche (“Castle Church”) in Weilburg since 1953
Religion Calvinism

William IV (22 April 1852 – 25 February 1912) reigned as the sovereign Grand Duke of Luxembourg from 17 November 1905 until his death. He succeeded his father, Adolphe, Grand Duke of Luxembourg. He also held the title of Duke of Nassau, although that was annexed by prussia after the austrian-prussian war of 1866.[1]

William IV was a Protestant, the religion of the House of Nassau. He married Princess Marie Anne of Portugal, believing that a Roman Catholic country ought to have a Roman Catholic monarch. Thus since William IV all other Grand Dukes have been Catholic.

At the death of his uncle, Prince Nikolaus-Wilhelm in 1905, the only other legitimate male in the House of Nassau-Weilburg was William's cousin, Georg Nikolaus, Count of Merenberg, the product of a morganatic marriage. So in 1907, William declared the Counts of Merenberg non-dynastic, naming his own eldest daughter Marie-Adélaïde (1894–1924) as heiress-presumptive to the grand ducal throne. She became Luxembourg's first reigning female monarch upon her father's death in 1912, and upon her own abdication in 1919, was succeeded by her younger sister Charlotte (1896–1985). Charlotte's descendants have reigned until the present day.

He was the last monarch of Luxembourg to die in office.


On 21 June 1893 in Fischhorn Castle, Zell am See, he married Infanta Marie Anne of Portugal, daughter of the deposed king Miguel I of Portugal and Adelaide of Löwenstein-Wertheim-Rosenberg. The couple had six daughters, but no sons:

Titles and honours[edit]

  • 22 April 1852 - 20 September 1866: His Highness The Hereditary Duke of Nassau[5]
  • 20 September 1866 - 23 November 1890: His Highness Prince William, Hereditary Duke of Nassau[5]
  • 23 November 1890 - 17 November 1905: His Royal Highness The Hereditary Grand Duke of Luxembourg, Prince of Nassau[6]
  • 17 November 1905 - 25 February 1912: His Royal Highness The Grand Duke of Luxembourg, Prince of Nassau[6]
National honours
Foreign honours



  1. ^ Almanach de Gotha (1901), article "Luxembourg"
  2. ^ http://www.angelfire.com/realm/gotha/gotha/schwarzenberg.html Princely House of Schwarzenberg
  3. ^ http://www.angelfire.com/realm/gotha/gotha/thurn.html Princely House of Thurn and Taxis
  4. ^ http://www.angelfire.com/realm/gotha/gotha/saxony.html Royal House of Saxony
  5. ^ a b It was customary for a reigning Duke, his heir apparent, and their spouses to use the style of Highness.
  6. ^ a b It was customary for a reigning Grand Duke, his heir apparent, and their spouses to use the style of Royal Highness
  7. ^ a b Miroslav MAREK. "Hesse-Homburg", 2003-05-02. Retrieved on 2009-03-05

External links[edit]

William IV, Grand Duke of Luxembourg
Cadet branch of the House of Nassau
Born: 12 April 1852 Died: 25 February 1912
Regnal titles
Preceded by
Grand Duke of Luxembourg
Succeeded by