|Grand Duke of Luxembourg|
|Reign||17 November 1905 – |
25 February 1912
|Regent||Marie Anne of Portugal|
|Prime Minister||Paul Eyschen|
|Born||22 April 1852|
Biebrich Palace, Wiesbaden, Duchy of Nassau
|Died||25 February 1912 (aged 59)|
Berg Castle, Colmar-Berg, Luxembourg
|Spouse||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
|Father||Adolphe, Grand Duke of Luxembourg|
|Mother||Princess Adelheid-Marie of Anhalt-Dessau|
William IV (William Alexander; French: Guillaume Alexandre; 22 April 1852 – 25 February 1912) reigned as the Grand Duke of Luxembourg from 17 November 1905 until his death. He succeeded his father, Adolphe.
Currently, William is the last monarch of Luxembourg to die while still on the throne.
Titles and styles[change | change source]
Although the duchy of Nassau was annexed by Prussia after the Austro-Prussian war of 1866, the title of Duke of Nassau was retained by William and his heirs. This does not imply any sovereignty over Nassau.
- 22 April 1852 - 23 November 1890: His Highness The Hereditary Prince of Nassau
- 23 November 1890 - 17 November 1905: His Royal Highness The Hereditary Grand Duke of Luxembourg, Hereditary Prince of Nassau
- 17 November 1905 - 25 February 1912: His Royal Highness The Grand Duke of Luxembourg, Duke of Nassau