Question: Who is Countess Ferdinande Henriette Of Stolberg-Gedern's maternal grandfather?

Knowledge 1: Countess Ferdinande Henriette of Stolberg-Gedern
Countess Ferdinande Henriette of Stolberg-Gedern, born 2 October 1699 at Gedern, Oberhessen, Hesse-Darmstadt, then in the Holy Roman Empire, was a daughter of Louis Christian, Count of Stolberg-Gedern, and Duchess Christine of Mecklenburg-Güstrow.She died at König, Starkenburg, Hesse-Darmstadt, on 31 January 1750, at age 50.Through her daughter Karoline she is a direct female line ancestor of Queen Victoria of the United Kingdom, King Michael of Romania, the last King of that country, King Felipe VI of Spain as well as of Carl XVI Gustaf of Sweden. [SEP] Knowledge 2: Christine of Mecklenburg-Güstrow
Christine of Mecklenburg-Güstrow (14 August 1663 – 3 August 1749) was a German noblewoman of the House of Mecklenburg and by marriage Countess of Stolberg-Gedern.Born in Güstrow, she was the sixth of eleven children born from the marriage of Gustav Adolph, Duke of Mecklenburg-Güstrow and Magdalene Sibylle of Holstein-Gottorp.From her ten older and younger siblings, eight survived to adulthood:Marie (by marriage Duchess of Mecklenburg-Strelitz), Magdalene, Sophie (by marriage Duchess of Württemberg-Oels), Charles, Hereditary Prince of Mecklenburg-Güstrow, Hedwig (by marriage Duchess of Saxe-Merseburg-Zörbig), Louise (by marriage Queen of Denmark and Norway), Elisabeth (by marriage Duchess of Saxe-Merseburg-Spremberg) and Augusta.She was the three-times great-grandmother of Queen Victoria of the United Kingdom.
Knowledge 1: Countess Ferdinande Henriette of Stolberg-Gedern
Countess Ferdinande Henriette of Stolberg-Gedern, born 2 October 1699 at Gedern, Oberhessen, Hesse-Darmstadt, then in the Holy Roman Empire, was a daughter of Louis Christian, Count of Stolberg-Gedern, and Duchess Christine of Mecklenburg-Güstrow.She died at König, Starkenburg, Hesse-Darmstadt, on 31 January 1750, at age 50.Through her daughter Karoline she is a direct female line ancestor of Queen Victoria of the United Kingdom, King Michael of Romania, the last King of that country, King Felipe VI of Spain as well as of Carl XVI Gustaf of Sweden. [SEP] Knowledge 2: Princess Louise of Stolberg-Gedern
Princess Louise Maximilienne Caroline Emmanuele of Stolberg- Gedern( 20 September 1752 – 29 January 1824) was the wife of Charles Edward Stuart, the Jacobite claimant to the English and Scottish thrones.She is commonly called the Countess of Albany.
Knowledge 1: Countess Ferdinande Henriette of Stolberg-Gedern
Countess Ferdinande Henriette of Stolberg-Gedern, born 2 October 1699 at Gedern, Oberhessen, Hesse-Darmstadt, then in the Holy Roman Empire, was a daughter of Louis Christian, Count of Stolberg-Gedern, and Duchess Christine of Mecklenburg-Güstrow.She died at König, Starkenburg, Hesse-Darmstadt, on 31 January 1750, at age 50.Through her daughter Karoline she is a direct female line ancestor of Queen Victoria of the United Kingdom, King Michael of Romania, the last King of that country, King Felipe VI of Spain as well as of Carl XVI Gustaf of Sweden. [SEP] Knowledge 2: Louise Christine of Stolberg-Stolberg-Ortenberg
Louise Christine of Stolberg- Stolberg- Ortenberg( 21 January 1675- 16 May 1738), was a German noblewoman member of the House of Stolberg and by her two marriages Countess of Mansfeld- Eisleben and Duchess of Saxe- Weissenfels.Born in Ortenberg, she was the sixth of the eight children born from the marriage of Christoph Louis I, Count of Stolberg- Stolberg- Ortenberg and Countess Louise Christine of Hesse- Darmstadt.From her seven older and younger siblings, four survive adulthood: Georg, Hereditary Prince of Stolberg- Stolberg- Ortenberg, Sophie Eleonore, Christoph Frederick and Jost Christian.

Answer: Gustav Adolph, Duke of Mecklenburg-Güstrow