Prince Guillaume of Luxembourg

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Grand Ducal Family 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.

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.

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.

Guillaume married Sibilla Weiller, a daughter of Paul-Annick Weiller and of the Italian princess Donna Olimpia Torlonia di Civitella-Cesi (daughter of the Spanish Infanta Beatriz of Spain) on 8 September 1994, who received the title "Princess of Luxembourg". Guillaume and Sibilla have four children, who carry the title "Prince(ss) of Nassau":

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


Preceded by
Prince Sébastien of Luxembourg
Line of succession to the Luxembourgian Throne Succeeded by
Prince Paul Louis of Nassau
In other languages