Prince Robert of Luxembourg

Prince Robert of Luxembourg, Prince of Bourbon-Parma, Prince of Nassau (Robert Louis François Marie; born 14 August 1968) is a member of the Grand Ducal Family of Luxembourg. He is a paternal first cousin of Henri, Grand Duke of Luxembourg.

He is currently the president of Domaine Clarence Dillon, the French wine company founded by his maternal great-grandfather, Clarence Dillon. As of October 2025, Prince Robert is 15th in the line of succession to the Luxembourger throne.

Early life and family Born on 14 August 1968 at Fischbach Castle, Luxembourg, he is the second child and only son of Prince Charles of Luxembourg, second son of Charlotte, Grand Duchess of Luxembourg, and Prince Felix of Bourbon-Parma, and his American-born wife, Joan Douglas Dillon, second daughter of politician and diplomat C. Douglas Dillon. He has one older half-sister from his mother's previous marriage and one older sister, Princess Charlotte (born 15 September 1967). Robert and his sister were raised at Fischbach Castle, which was then the home of his paternal grandparents. Their mother is a Catholic convert, having done so in 1953.

Robert was educated first at a primary school in Belair before attending Worth School, a Catholic boarding school near Worth, West Sussex, United Kingdom. He studied philosophy and psychology at Georgetown University but left university before graduating to travel through the Middle East and North Africa, India, Nepal, and South America. Robert married Julie Elizabeth Houston Ongaro in Boston, Massachusetts. She is the daughter of urologist and Harvard professor Dr. Theodore Ongaro and wife Katherine Houston. They have three children: Prince Alexandre Théodore Charles Marie of Nassau (born 18 April 1997) Prince Frederik Henri Douglas Marie of Nassau (18 March 2002 – 1 March 2025)

Robert's youngest son Frederik died in Paris on 1 March 2025 from POLG congenital mitochondrial disease. He had been diagnosed with the disease when he was 14.

Career In 1992, Robert and his future wife wrote a screenplay based on Don Juan. This caught the eye of Steven Spielberg and Creative Artists Agency. He left screenwriting to join the family wine business.

As president, Robert has overseen the creation of one of the largest Saint-Émilion estates and the opening of Restaurant Le Clarence, a two Michelin star restaurant in the 8th arrondissement of Paris, in 2015.

Honours

Ancestry