Question: What King of Scots is the currently reigning Grand Duke of Luxembourg descended from?

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Orangism (Luxembourg): Orangism was a movement in the 19th century Grand Duchy of Luxembourg favouring the personal union of the Netherlands and Luxembourg under the House of Orange-Nassau.  Made up of many notable figures, mainly nobles and Roman Catholic clergy, they were moderate liberals or conservative-liberals and slightly anti-clerical.  At first they favoured maintaining the Grand Duchy's autonomous status and, especially during the Belgian Revolution, opposed it being merged into Belgium.  In the end the western part of the Grand Duchy (the present province of Luxembourg) passed to Belgium, whilst the eastern part and the Orange grand duchy continued as an independent state.  In 1890 the heads of the House of Orange were grand dukes of Luxembourg, but on the death of king and grand duke William III in 1890 he was succeeded by his relation Adolphe as grand duke since Luxembourg's constitution did not allow a woman (Princess Wilhelmina) to hold the throne.  The movement's newsletter was the "Journal de la Ville et du Pays Luxembourg".

Henri, Grand Duke of Luxembourg: Henri (Luxembourgish: "Henri Albert Gabriel Félix Marie Guillaume" , ] ; born 16 April 1955) is the current Grand Duke of Luxembourg, reigning since 7 October 2000.  He is the eldest son of Grand Duke Jean and Princess Joséphine-Charlotte of Belgium, and a first cousin of Philippe, the current king of Belgium.

Princess Margaretha of Liechtenstein: Princess Margaretha of Liechtenstein (born "Princess Margaretha of Luxembourg" on 15 May 1957) is the fourth child and second daughter of Grand Duke Jean of Luxembourg and Princess Joséphine Charlotte of Belgium.  As the sister of Grand Duke Henri of Luxembourg and the sister-in-law of Prince Hans-Adam II of Liechtenstein, she is a princess of two current realms and a member of the Luxembourg and Liechtenstein reigning dynasties.  The Princess holds similar precedence in both monarchies, as sister and sister-in-law of the Sovereign.

Princess Marie Gabriele of Luxembourg: Princess Marie Gabriele of Luxembourg, Countess of Holstein-Ledreborg (given names: "Marie Gabrielle Aldegunde Wilhelmine Louise"; born 2 August 1925) is the third daughter and fourth of the six children of Grand Duchess Charlotte of Luxembourg and her husband Prince Félix.  She is the younger sister of former Grand Duke Jean of Luxembourg and thus a paternal aunt to the current Grand Duke, Jean's son Grand Duke Henri.  In 1951 she married Danish Count Karl Johan Ludvig, 7th Count of Holstein-Ledreborg (2 October 1919 – 25 June 2001), Roman Catholic; the couple were married for 50 years until his death in 2001.  Together, they had seven daughters.

General Honor Decoration (Hesse): The General Honor Decoration (German: "Allgemeines Ehrenzeichen" ) was a civil and military decoration of the Grand Duchy of Hesse.  Established 25 September 1843, the medal could be awarded to recognize several different accomplishments or merits.  The reason for the award of the medal was determined by the inscription on the reverse of the medal, with the obverse bearing the effigy of the reigning Grand Duke of Hesse.

Duke Christian Louis of Mecklenburg: Duke Christian Louis of Mecklenburg (German: "Christian-Ludwig Herzog zu Mecklenburg" ; 29 September 191218 July 1996) was the second son of the last reigning Grand Duke of Mecklenburg-Schwerin, Frederick Francis IV.

Peter II, Grand Duke of Oldenburg: Peter II (German: "Nikolaus Friedrich Peter" ) (8 July 1827 – 13 June 1900) was the reigning Grand Duke of Oldenburg from 1853 to 1900.  He claimed hereditary parts of Duchy of Holstein after the Second Schleswig War in 1864.  After signing a treaty on 23 February 1867 in Kiel, he renounced his claims.  But, he received the district of Ahrensbök, the Prussian parts of the former Principality of Lübeck (except the village of Travenhorst), and was given a million taler as compensation from Prussia.  Thus the Grand Duchy of Oldenburg gained access to the Baltic Sea.

Descendants of James VI and I: James VI and I (19 June 1566 – 27 March 1625), the only child of Mary, Queen of Scots, was King of Scots from 1567 and King of England and Ireland from 1603, being the first monarch of the House of Stuart to rule all three countries.  His descendants include Elizabeth II of the United Kingdom, Philippe of Belgium, Felipe VI of Spain, Carl XVI Gustaf of Sweden, Margrethe II of Denmark, Harald V of Norway, Willem-Alexander of the Netherlands, and Henri, Grand Duke of Luxembourg.  This article deals with numerous descendants of James and his wife Anne of Denmark (Since he is not known to have had any illegitimate children).

Augustus, Grand Duke of Oldenburg: Augustus (13 July 1783 – 27 February 1853) was the reigning Grand Duke of Oldenburg from 1829 to 1853.

Grand Ducal Highness: His or Her Grand Ducal Highness (abbreviation: HGDH) is a style of address used by the non-reigning members of some German ruling families headed by a Grand Duke.  No currently reigning family employs the style, although it was used most recently by the younger sisters of the late Grand Duchess Charlotte of Luxembourg.  Since Grand Duchess Charlotte's marriage to Prince Felix of Bourbon-Parma, all of their male-line descendants have used the style Royal Highness, which he bore.

Supporting paragraphs: Descendants of James VI and I Henri, Grand Duke of Luxembourg
Answer: James VI and I