The grand ducal family of Luxembourg constitutes the House of Luxembourg-Nassau, headed by the sovereign grand duke, and in which the throne of the grand duchy is hereditary. It consists of heirs and descendants of the House of Nassau-Weilburg, whose sovereign territories passed cognatically from the House of Nassau to the House of Bourbon-Parma, itself a branch of the Spanish royal house which is agnatically a cadet branch of the House of Capet that originated in France, itself a derivative dynasty from the Robertians and the Karlings and the founding house of the Capetian dynasty.
Adolphe was Grand Duke of Luxembourg from 23 November 1890 to his death on 17 November 1905. The first grand duke from the House of Nassau-Weilburg, he succeeded King William III of the Netherlands, ending the personal union between the Netherlands and Luxembourg. Adolphe was Duke of Nassau from 20 August 1839 to 20 September 1866, when the Duchy was annexed to the Kingdom of Prussia.
Jean was the Grand Duke of Luxembourg from 1964 until his abdication in 2000. He was the first Grand Duke of Luxembourg of French agnatic descent.
Henri is Grand Duke of Luxembourg, reigning since 2000. He is the eldest son of Grand Duke Jean and Princess Joséphine-Charlotte of Belgium, as well as a first cousin of King Philippe of Belgium. In 2019, his net worth was estimated around US$4 billion.
William IV was Grand Duke of Luxembourg from 17 November 1905 until his death in 1912. He succeeded his father, Adolphe. Like his father, William mostly stayed out of politics despite being vested with considerable power on paper by the Constitution.
Charlotte was Grand Duchess of Luxembourg from 14 January 1919 until her abdication on 12 November 1964. Her reign is the longest of any Luxembourgish monarch since 1815 when the country was elevated to a Grand Duchy.
Prince Félix of Luxembourg, Prince of Bourbon-Parma and Prince of Nassau is the second son of Henri, Grand Duke of Luxembourg, and Maria Teresa, Grand Duchess of Luxembourg. He is currently fourth in the line of succession to the throne of Luxembourg.
A cadet branch consists of the male-line descendants of a monarch's or patriarch's younger sons (cadets). In the ruling dynasties and noble families of much of Europe and Asia, the family's major assets have historically been passed from a father to his firstborn son in what is known as primogeniture; younger sons, the cadets, inherited less wealth and authority to pass on to future generations of descendants.
The Nassau Family Pact was a mutual pact of inheritance and succession made in 1783 by princes of the House of Nassau. It confirmed that Salic Law was to operate in favor of all the agnatic lines of the family, specifically the two senior surviving lines which had originated in the Middle Ages, the Walramian and the Ottonian. The pact chiefly provided that in case of one of these lines becoming extinct, the other would succeed in its hereditary Nassau lands.
Archduchess Marie-Astrid of Austria is the elder daughter and eldest child of Jean, Grand Duke of Luxembourg, and Princess Joséphine-Charlotte of Belgium, and the wife of Archduke Carl Christian of Austria, grandson of the last Austrian Emperor, Karl I.
Count of Merenberg is a hereditary title of nobility that was bestowed in 1868 by the reigning Prince of Waldeck and Pyrmont, George Victor, upon the morganatic wife and male-line descendants of Prince Nikolaus Wilhelm of Nassau (1832–1905), who married Natalia Alexandrovna Pushkina (1836–1913), former wife of Russian general Mikhail Leontievich von Dubelt.
Since 2011, the crown of Luxembourg descends according to absolute primogeniture among Grand Duke Henri's descendants and according to agnatic primogeniture among other dynasts.
Wilhelm was joint sovereign Duke of Nassau, along with his father's cousin Frederick Augustus, reigning from 1816 until 1839. He was also sovereign Prince of Nassau-Weilburg from 1816 until its incorporation into the duchy of Nassau.
The Order of the Gold Lion of the House of Nassau is a chivalric order shared by the two branches of the House of Nassau.
The House of Bourbon-Parma is a cadet branch of the Spanish royal family, whose members once ruled as King of Etruria and as Duke of Parma and Piacenza, Guastalla, and Lucca. The House descended from the French Capetian dynasty in male line. Its name of Bourbon-Parma comes from the main name (Bourbon) and the other (Parma) from the title of Duke of Parma. The title was held by the Spanish Bourbons, as the founder Philip, Duke of Parma was the great-grandson of Ranuccio II Farnese, Duke of Parma. The House of Bourbon-Parma is today the Sovereign House of the Grand Duchy of Luxembourg (agnatically) and all members of the Grand Ducal Family of Luxembourg are members of the House of Bourbon-Parma with the title of "Princes/Princesses" and the predicate of Royal Highness.
Prince Nikolaus Wilhelm of Nassau was a German prince, military officer and parliamentarian. He was the youngest son of William, Duke of Nassau, and the only son by his second wife Princess Pauline of Württemberg.
Princess Adelheid-Marie of Anhalt-Dessau was a Princess of Anhalt-Dessau and member of the House of Ascania. As the wife of Adolphe of Nassau, she was Duchess of Nassau from 1851 until 1866 and Grand Duchess of Luxembourg from 1890 until 1905.
Prince Robert of Luxembourg, Prince of Bourbon-Parma, Prince of Nassau, is a member of the Grand Ducal Family of Luxembourg. He is a paternal first cousin of Henri, the reigning grand duke of Luxembourg.
