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Guillaume of Luxembourg

b. 1963

Luxemborgian prince

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About Guillaume of Luxembourg

Born 1963. Guillaume of Luxembourg is a Luxembourgish aristocrat.

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. He is currently 11th in the line of succession to the Luxembourgish throne.

Life 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.

On the night of 10 to 11 September 2000, Prince Guillaume and Princess Sibilla were involved in a serious car accident near Paris. Guillaume was in a coma for almost a month. The transfer of the throne between his father Grand Duke Jean and his brother Henri was postponed from 28 September to 7 October.

Marriage and children Prince Guillaume married Sibilla Sandra Weiller y Torlonia (b. 12 June 1968, Neuilly-sur-Seine, France), the second child of French industrialist and patron of the Arts Paul-Annik Weiller (son of Paul-Louis Weiller and Aliki, Lady Russell) and Italian noblewoman Donna Olimpia Torlonia di Civitella-Cesi (daughter of Alessandro Torlonia, 5th Prince of Civitella-Cesi and Infanta Beatriz of Spain, also descendant of Queen Victoria of the United Kingdom) and the second cousin of King Felipe VI of Spain civilly in Sélestat on 8 September 1994 and religiously at Versailles Cathedral on 24 September 1994, who received the title "Princess of Luxembourg". Guillaume and Sibilla have four children:

Prince Paul-Louis Jean Marie Guillaume de Nassau (b. 4 March 1998, Luxembourg). Prince Léopold Guillaume Marie Joseph de Nassau (b. 2 May 2000, Luxembourg). Twin of Princess Charlotte. Princess Charlotte Wilhelmine Maria da Gloria de Nassau (b. 2 May 2000, Luxembourg). Twin of Prince Léopold. Prince Jean André Guillaume Marie Gabriel Marc d'Aviano de Nassau (b. 13 July 2004, Luxembourg).

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

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

Honours

National Knight of the Order of the Gold Lion of the House of Nassau Knight Grand Cross of the Order of Adolphe of Nassau

Foreign Albanian Royal Family: Knight Grand Cross of the Royal Order of Skanderbeg Knight Grand Cross of the Order of the Crown Knight Grand Cross of the Order of Isabella the Catholic Knight Grand Cross of the Order of the Polar Star

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Important facts

Birth century
Occupation
Nationality
Education
University of Oxford, Georgetown University, Walsh School of Foreign Service
Awards
Grand Cross of the Order of the Crown; Grand Cross of the Order of Isabella the Catholic
Also known as
Guillaume Marie Louis Christian de Nassau, Prince de Luxembourg, William Mary Louis Christian of Nassau

Family & relationships

Parent
Jean, Grand Duke of Luxembourg
Parent
Princess Joséphine Charlotte of Belgium

People in Guillaume of Luxembourg's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Guillaume of Luxembourg's

Frequently asked questions

Who is Guillaume of Luxembourg?

Luxemborgian prince

When was Guillaume of Luxembourg born?

Guillaume of Luxembourg was born on 1 May 1963 in Betzdorf Castle.

What is Guillaume of Luxembourg's occupation?

Guillaume of Luxembourg is an aristocrat.

What nationality is Guillaume of Luxembourg?

Guillaume of Luxembourg is Luxembourgish.

Sources & further reading

· Wikipedia: Guillaume of Luxembourg

· Wikidata: Q646338

· DBpedia: Prince Guillaume of Luxembourg

Cite this page

APA: Biography.guide. (2026). Guillaume of Luxembourg. https://biography.guide/guillaume-of-luxembourg/

MLA: "Guillaume of Luxembourg." Biography.guide, https://biography.guide/guillaume-of-luxembourg/.

Chicago: "Guillaume of Luxembourg." Biography.guide. https://biography.guide/guillaume-of-luxembourg/.

Data last updated: 2026-10-01 · Spot an error? Report a correction.

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