Question: Who is the paternal grandfather of Duchess Elisabeth Alexandrine Of Württemberg?

Context paragraphs:
title: Duchess Elisabeth Alexandrine of Württemberg
paragraph_text: Duchess Elisabeth Alexandrine Constance of Württemberg( 27 February 1802 in Würzau, Courland Governorate – 5 December 1864, in Karlsruhe) was a daughter of Duke Louis of Württemberg and Princess Henriette of Nassau- Weilburg.
title: Duchess Elisabeth of Württemberg (b. 1933)
paragraph_text: Duchess Elisabeth of Württemberg( born 2 February 1933) is a member of the House of Württemberg and a Duchess of Württemberg by birth and through her marriage to Prince Antoine of Bourbon- Two Sicilies, a member of the House of Bourbon- Two Sicilies and a Princess of Bourbon- Two Sicilies.
title: Christoph, Duke of Württemberg
paragraph_text: Christoph of Württemberg, Duke of Württemberg (12 May 1515 – 28 December 1568) ruled as Duke of Württemberg from 1550 until his death in 1568.
title: Princess Catherine of Württemberg
paragraph_text: Princess Catherine Frederica Charlotte of Württemberg (Stuttgart, 24 August 1821 – Stuttgart, 6 December 1898) was a daughter of William I of Württemberg and Pauline Therese of Württemberg. She was the mother of William II of Württemberg.
title: Duchess Altburg of Oldenburg
paragraph_text: Duchess Altburg Marie Matilda Olga of Oldenburg (19 May 1903 – 16 June 2001) was a daughter of Frederick Augustus II, Grand Duke of Oldenburg by his second wife Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
title: Prince Frederick of Württemberg
paragraph_text: Prince" Frederick" Charles Augustus of Württemberg( 21 February 1808 – 9 May 1870) was a General in the Army of Württemberg and the father of William II of Württemberg. Frederick was a member of the Royal Family of Württemberg and a Prince of Württemberg.
title: Princess Augusta of Württemberg
paragraph_text: Princess Augusta of Württemberg( 4 October 1826 in Stuttgart – 3 December 1898, ibid.) was a daughter of King William I of Württemberg and his wife, Pauline of Württemberg.
title: Duke Louis of Württemberg
paragraph_text: Duke Louis of Württemberg ("Ludwig Friedrich Alexander") (Treptow an der Rega, 30 August 1756 – Kirchheim unter Teck, 20 September 1817) was the second son of Frederick II Eugene, Duke of Württemberg (1732–1797) and Margravine Sophia Dorothea of Brandenburg-Schwedt (1736–1798). His elder brother was Frederick I, the first King of Württemberg, his sister was the Russian Empress consort, Maria Feodorovna. Louis retained the pre-royal title of Duke.
title: Princess Alexandrine of Prussia (1842–1906)
paragraph_text: Princess Frederica Wilhelmina Louise Elisabeth "Alexandrine" of Prussia (1 February 1842 – 26 March 1906) was a member of the House of Hohenzollern as the daughter of Prince Albert of Prussia and his wife Princess Marianne of the Netherlands.
title: Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
paragraph_text: Duchess Elisabeth Alexandrine of Mecklenburg- Schwerin( 10 August 1869 – 3 September 1955) was a daughter of Frederick Francis II, Grand Duke of Mecklenburg by his third wife Princess Marie of Schwarzburg- Rudolstadt. By her marriage to Frederick Augustus II, she became the consort of the last reigning Grand Duke of Oldenburg.

Reasoning steps:
Duchess Elisabeth Alexandrine Constance of Württemberg father Duke Louis of Württemberg
Duke Louis of Württemberg father Frederick II Eugene, Duke of Württemberg

Answer: spans: Frederick II Eugene, Duke of Württemberg