Prince Jean of Luxembourg

Prince Jean of Luxembourg (given names: Jean Félix Marie Guillaume; born 15 May 1957 at Betzdorf Castle), the second son of Jean, Grand Duke of Luxembourg and Princess Joséphine-Charlotte of Belgium. He is the twin brother of Princess Margaretha. He frequently goes by the name of Jean Nassau.

Prince Jean
Born (1957-05-15) 15 May 1957
Castle Betzdorf, Betzdorf, Luxembourg.
Hélène Suzanna Vestur
(m. 1987; div. 2004)

Diane de Guerre
(m. 2009)
IssuePrincess Marie-Gabrielle of Nassau
Prince Constantin of Nassau
Prince Wenceslas of Nassau
Prince Carl-Johan of Nassau
Full name
Jean Félix Marie Guillaume
FatherJean, Grand Duke of Luxembourg
MotherPrincess Joséphine Charlotte of Belgium
ReligionRoman Catholicism

On 26 September 1986, Prince Jean renounced his right of succession to the Luxembourg throne.

Education and youth

Prince Jean's godparents were Prince Felix of Luxembourg and Princess Margrethe of Denmark.

Prince Jean was educated in Luxembourg, Switzerland and France, where he obtained his baccalaureate. He then undertook a language course at the Bell School of Languages in Cambridge England.

In 1977, Prince Jean began his military officer training at the Royal Military Academy Sandhurst, England and member of the Champion Platoon, he was commissioned in August 1978. He was made a captain of the Luxembourg Army in 1979. After completing his university education in Geneva, he went to New York and joined W.R. Grace as a financial analyst working in the Finance, Planning & Analysis Division of the Group that reported to the President & CEO of the company, at the time, Mr J. Peter Grace. Back in Europe in 1985, in 1986 he obtained an MBA from INSEAD in Fontainebleau, France.


Prince Jean works in the water industry, he is an advisor to the GDF-Suez Group, Executive VP of the Suez Fondation and a Member of the Executive Board of Degrémont, a subsidiary of Suez Environnement. Prince Jean has been President of the Chambre de Commerce belgo-luxembourgeoise en France. In 2006 he bought the Southern African Water subsidiary of Suez Environnement, WSSA (Water & Sanitation South Africa) and created Mea Aqua, with the objective of developing water and energy solutions in the Middle East and in Africa. Mea Aqua and its subsidiaries employ today over 2,500 employees.

Prince Jean is a member of the board of the MIP, a business school based in Paris and a board member of a number of financial institutions: Banque Degroof Luxembourg, EFG Bank and EFG International, Ecofin (hedge funds in the utilities sector).[1]

Marriage and family

On 27 May 1987, Prince Jean married morganatically in Paris, France, Hélène Suzanna Vestur (born 31 May 1958 in Saint-Germain-en-Laye), now a high civil servant, Conseiller d'Etat and judge, daughter of François Philippe Vestur and Cécile Ernestine Buisson.[2] His wife and children bore the title "Count(ess) of Nassau" from 21 September 1995.[2] On 27 November 2004 Grand-Duc Henri issued an Arrêté Grand-Ducal upgrading the titles of Prince Jean's children to Prince/Princesse de Nassau with the qualification of Altesse Royale, without succession rights.[2] The prince and former countess divorced in 2004, having had four children together:[2]

  • Princess Marie-Gabrielle Cécile Charlotte Sophie of Nassau (born 8 September 1986 in Paris), married to Antonius Benedikt Clemens Douglas Emanuel Willms (born 22 September 1988 in Atlanta), son of Hayo Willms and Marie Theresia Reichsgräfin von Goëss. The civil wedding took place on 15 May 2017 in Luxembourg City; the religious wedding took place on 2 September 2017 in Marbella, Spain.
    • Zeno Philippe Leopold Marcus d'Aviano Willms (born 5 June 2018 in Munich)
  • Prince Constantin Jean Philippe Marie Albert Marc d'Aviano of Nassau (born 22 July 1988 in Paris)
    • Felix (born April 2018)
  • Prince Wenceslas François Baudoin Léopold Juraj Marie Marc d'Aviano of Nassau (born 17 November 1990 in Paris)
  • Prince Carl-Johan Félix Julien Marc d'Aviano of Nassau (born 15 August 1992 in Paris)

On 18 March 2009, Prince Jean married Diane de Guerre in a civil ceremony in Roermond, and they do not have any children to date.[3] She is a daughter of general Claude Gaston de Guerre (1910-1997) and Countess Eugenie Marie Wolff Metternich (1923-2016).

Honours and awards

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

National honours

Foreign honours



  1. "Organisation". Chambre de Commerce belgo-luxembourgeoise en France. Retrieved 18 January 2010.
  2. Genealogisches Handbuch des Adels, Fürstliche Häuser XVIII. "Luxemburg". C.A. Starke Verlag, 2007, pp. 80, 82, 449-450. ISBN 978-3-7980-0841-0.
  3. "Bijzonder huwelijk in het Stadhuis van Roermond" [Special wedding in Roermond]. Gemeente Roermond (in Dutch). 19 March 2009. Retrieved 19 January 2010.
  4. "Honorary distinctions of the Grand Duchy of Luxembourg" (PDF). Service Information et Presse. Retrieved 21 September 2007.
  5. (by birth[4])
  6. 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)
  7. (by birth, on 18 years old[6])
  8. Boletín Oficial del Estado
  9. Boletín Oficial del Estado

Media related to Prince Jean of Luxembourg (1957) at Wikimedia Commons

Prince Jean of Luxembourg
Royal titles
Preceded by
Prince Sébastien of Luxembourg
Line of succession to
the French throne (Legitimist)

49th position
Succeeded by
Prince Constantin of Nassau
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