# List of heirs to the throne of Luxembourg

This page is a list of heirs to the throne of Luxembourg. The list includes all individuals who were considered to inherit the throne of Luxembourg, either as heir apparent or as heir presumptive, since the constitution of the Grand Duchy of Luxembourg on 15 March 1815. Those who actually succeeded as Grand Duke or Grand Duchess of Luxembourg are shown in bold.
The Grand Duchy of Luxembourg was created in 1815 by the Congress of Vienna and given to the new King of the United Kingdom of the Netherlands in exchange for his ancestral Principality of Orange-Nassau, which went to Prussia; as a result, the first Grand Dukes of Luxembourg were Dutch kings also, and their heirs were eligible for both thrones. This union began to crack in 1884, when the last son of the King-Grand Duke died, leaving no male heir in the Orange-Nassau line. While the King's daughter Wilhelmina could (and would) inherit the Dutch throne, Luxembourg, a "German" territory, followed the Nassau Family Pact of 1783, wherein Salic law (barring females from inheriting) applied. Instead, the throne passed to the only remaining branch of the Nassau family, the House of Nassau-Weilburg.
This branch would face a similar situation only twenty years later: the Grand Duke had six daughters but no sons, and had deemed his cousins the Counts of Merenberg, issue of a morganatic marriage, illegible to inherit the throne. Instead (to the protest of the Count of Merenberg), he instituted a solution, whereby his daughters (and their male heirs) became eligible to succeed.
In 2011 the law of succession was changed to allow women to inherit the throne with equal right to men.
Heirs to the Luxembourgish throne :
| In personal union with the Kingdom of the Netherlands (1815–1890) ||||||
| Monarch | Heir | Relationship to monarch | Became heir (Date; Reason) | Ceased to be heir (Date; Reason) | Next in line of succession |
| Willem I | Prince Willem, Prince of Orange | Son | 16 March 1815 Father became grand duke | 7 October 1840 Father abdicated, became grand duke | Prince Frederik, 1815–1817, brother |
| Willem I | Prince Willem, Prince of Orange | Son | 16 March 1815 Father became grand duke | 7 October 1840 Father abdicated, became grand duke | Prince Willem, 1817–1840, son |
| Willem II | Prince Willem, Prince of Orange | Son | 7 October 1840 Father became grand duke | 17 March 1849 Father died, became grand duke | Prince Willem, son |
| Willem III | Prince Willem, Prince of Orange | Son | 17 March 1849 Father became grand duke | 11 June 1879 Died | Prince Maurits, 1849–1850, brother |
| Willem III | Prince Willem, Prince of Orange | Son | 17 March 1849 Father became grand duke | 11 June 1879 Died | Prince Hendrik, 1850–1851, uncle |
| Willem III | Prince Willem, Prince of Orange | Son | 17 March 1849 Father became grand duke | 11 June 1879 Died | Prince Alexander, 1851–1879, brother |
| Willem III | Prince Alexander, Prince of Orange | Son | 11 June 1879 Brother died | 21 June 1884 Died | Prince Frederik, 1879–1881, granduncle |
| Willem III | Prince Alexander, Prince of Orange | Son | 11 June 1879 Brother died | 21 June 1884 Died | Adolph, Duke of Nassau, 1881–1884, 18th cousin |
| Willem III | Adolph, Duke of Nassau | 17th cousin once-removed | 21 June 1884 18th cousin died | 23 November 1890 17th cousin once-removed died, became grand duke | Hereditary Prince Wilhelm of Nassau, son |
| After the personal union (1890–present) ||||||
| Monarch | Heir | Relationship to monarch | Became heir (Date; Reason) | Ceased to be heir (Date; Reason) | Next in line of succession |
| Adolphe | Hereditary Grand Duke Guillaume | Son | 23 November 1890 Father became grand duke | 17 November 1905 Father died, became grand duke | Prince Nikolaus Wilhelm of Nassau, 1890–1905, half-uncle |
| Adolphe | Hereditary Grand Duke Guillaume | Son | 23 November 1890 Father became grand duke | 17 November 1905 Father died, became grand duke | None, 1905 |
| Guillaume IV | None, 1905–1907 | None, 1905–1907 | None, 1905–1907 | None, 1905–1907 | None, 1905–1907 |
| Guillaume IV | Hereditary Grand Duchess Marie-Adélaïde | Daughter | 10 July 1907 Guillaume IV's daughters and their heirs male declared eligible | 25 February 1912 Father died, became grand duchess | Princess Charlotte, sister |
| Marie-Adélaïde | Princess Charlotte | Sister | 25 February 1912 Sister became grand duchess | 14 January 1919 Sister abdicated, became grand duchess | Princess Hilda, sister |
| Charlotte | Princess Hilda | Sister | 14 January 1919 Sister became grand duchess | 5 January 1921 Son born to grand duchess | Princess Antoinette, sister |
| Charlotte | Hereditary Grand Duke Jean | Son | 5 January 1921 Born | 12 November 1964 Mother abdicated, became grand duke | Princess Hilda, 1921–1927, aunt |
| Charlotte | Hereditary Grand Duke Jean | Son | 5 January 1921 Born | 12 November 1964 Mother abdicated, became grand duke | Prince Charles, 1927–1955, brother |
| Charlotte | Hereditary Grand Duke Jean | Son | 5 January 1921 Born | 12 November 1964 Mother abdicated, became grand duke | Prince Henri, 1955–1964, son |
| Jean | Hereditary Grand Duke Henri | Son | 12 November 1964 Father became grand duke | 7 October 2000 Father abdicated, became grand duke | Prince Jean, 1964–1981, brother |
| Jean | Hereditary Grand Duke Henri | Son | 12 November 1964 Father became grand duke | 7 October 2000 Father abdicated, became grand duke | Prince Guillaume, 1981–2000, son |
| Henri | Hereditary Grand Duke Guillaume | Son | 7 October 2000 Father became grand duke | Incumbent | Prince Félix, 2000–2020, brother |
| Henri | Hereditary Grand Duke Guillaume | Son | 7 October 2000 Father became grand duke | Incumbent | Prince Charles, 2020–present, son |