Prince Guillaume of Luxembourg

Prince Guillaume of Luxembourg (Guillaume Marie Louis Christian; born 1 May 1963) is the third son and youngest child of Grand Duke Jean and Grand Duchess Josephine-Charlotte of Luxembourg.

Prince Guillaume
Born (1963-05-01) 1 May 1963
Betzdorf Castle, Betzdorf, Luxembourg
IssuePrince Paul Louis of Nassau
Prince Léopold of Nassau
Princess Charlotte of Nassau
Prince Jean of Nassau
Full name
Guillaume Marie Louis Christian
FatherJean, Grand Duke of Luxembourg
MotherPrincess Joséphine Charlotte of Belgium


Prince Guillaume was born in Betzdorf Castle. He attended secondary school in Luxembourg and Switzerland, and received his baccalaureate 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. Guillaume 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

Prince Guillaume married Sibilla 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:

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

Titles, styles, and honours

Styles of
Prince Guillaume of Luxembourg
Reference styleHis Royal Highness
Spoken styleYour Royal Highness
Alternative styleSir


  • 1 May 1963 – present: His Royal Highness Prince Guillaume of Luxembourg, Prince of Nassau, Prince of Bourbon-Parma


National honours

Foreign honours



Prince Guillaume of Luxembourg
Cadet branch of the House of Nassau
Born: 11 November 1981
Preceded by
Prince Sébastien of Luxembourg
Succession to the Luxembourger throne
7th position
Followed by
Prince Paul Louis of Nassau

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