Prince Guillaume of Luxembourg

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Prince Guillaume
Spouse Sibilla Sandra Weiller
Issue Prince Paul Louis of Nassau
Prince Léopold of Nassau
Princess Charlotte of Nassau
Prince Jean of Nassau
Full name
Guillaume Marie Louis Christian
Father Jean, Grand Duke of Luxembourg
Mother Joséphine Charlotte of Belgium
Born (1963-05-01) 1 May 1963 (age 51)
Betzdorf Castle

Prince Guillaume of Luxembourg (Guillaume Marie Louis Christian) born 1 May 1963 in Betzdorf Castle, is the third son and youngest child of Grand Duke Jean and Grand Duchess Josephine-Charlotte of Luxembourg. His godparents are Louis, Prince Napoléon and Princess Maria Cristina of Savoy-Aosta.


Guillaume attended secondary school in Luxembourg and Switzerland, and received his baccalureate in Grenoble in 1982. He continued his studies at the University of Oxford in the United Kingdom, and later at Georgetown University in Washington, D.C., where he graduated in 1987. Prince Guillaume of Luxembourg was presented the degree Doctor of Humane Letters, honoris causa, at Sacred Heart University’s Academic Convocation and Induction of the Class of 2011 on 10 September 2007. The official ceremony welcomed the first-year students to SHU with a formal academic procession and messages from the faculty, student representatives, and president Anthony J. Cernera, PhD.

Guillaume worked for six months at the International Monetary Fund in Washington, and spent two years working for the Commission of the European Communities in Brussels. He is currently a director of ArcelorMittal.[1]

Marriage and children[edit]

Guillaume married Sibilla Sandra Weiller, a daughter of Paul-Annik Weiller and of the Italian princess Donna Olimpia Torlonia di Civitella-Cesi (daughter of the Spanish Infanta Beatriz of Spain) civilly on 8 September 1994 and religiously in Versailles on 24 September 1994, who received the title "Princess of Luxembourg". Guillaume and Sibilla have four children:

  • Prince Paul Louis Jean Marie Guillaume of Nassau (b. Luxembourg, 4 March 1998) Paul Louis is godson of his cousin, Hereditary Grand Duke Guillaume of Luxembourg.
  • Prince Léopold Guillaume Marie Joseph of Nassau (b. Luxembourg, 2 May 2000).
  • Princess Charlotte Wilhelmine Maria da Gloria of Nassau (b. Luxembourg, 2 May 2000).
  • Prince Jean André Guillaume Marie Gabriel Marc d'Aviano of Nassau (b. Luxembourg, 13 July 2004).

Their sons are in the line of succession to the throne of Luxembourg.

Prince Guillaume is the godfather of his nephew Guillaume, Hereditary Grand Duke of Luxembourg. He is also one of the godparents of Prince Achileas-Andreas of Greece and Denmark, second son of Pavlos, Crown Prince of Greece.

Honours and awards[edit]

Styles of
Prince Guillaume of Luxembourg
Reference style His Royal Highness
Spoken style Your Royal Highness
Alternative style Sir

See also List of honours of the Luxembourgish Grand-Ducal Family by country

National honours[edit]

As a son and brother of one of the 2 Heads of the House :

As Prince of Luxembourg, when 18 years old :

Foreign honours[edit]

For his children, as Princes & Princesses of Luxembourg, when 18 years old :



  1. ^ ArcelorMittal (2013). Board of Directors. Retrieved 28 November 2013.
  2. ^ "Honorary distinctions of the Grand Duchy of Luxembourg". Service Information et Presse. Retrieved 2007-09-21. 
  3. ^ a b Honorary distinctions of the Grand Duchy of Luxembourg, publication of the government of Luxembourg : Princes and Princesses of the Grand-Ducal House of Luxembourg are Grand Crosses of the Order by birth but the decoration is worm only after they reach their majority (18 years old)
  4. ^ Boletín Oficial del Estado
  5. ^ Royalement Blog, State visit of Belgium in Luxembourg (1994), Princes Photos, Group Photo
Prince Guillaume of Luxembourg
Cadet branch of the House of Nassau
Born: 11 November 1981
Preceded by
Prince Sébastien
Line of succession to the Luxembourger throne
6th position
Succeeded by
Prince Paul Louis