What King of Scots is the currently reigning Grand Duke of Luxembourg descended from?
James VI and I
Title: Henri, Grand Duke of Luxembourg
Passage: 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.
Title: Augustus, Grand Duke of Oldenburg
Passage: Augustus (13 July 1783 – 27 February 1853) was the reigning Grand Duke of Oldenburg from 1829 to 1853.
Title: Descendants of James VI and I
Passage: 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).
Henri, Grand Duke of Luxembourg Descendants of James VI and I