Question: What country was the grandma of the wife of Ernest II, Duke of Saxe-Coburg and Gotha from?

full_context: Document 1: Princess Alexandrine of Prussia (1842–1906): 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.
Document 2: Princess Amalie of Saxe-Coburg and Gotha: Princess Marie Luise Franziska "Amalie" of Saxe-Coburg and Gotha, full German name: "Marie Luise Franziska Amalie, Prinzessin von Sachsen-Coburg und Gotha, Herzogin zu Sachsen" (23 October 1848, Coburg, Saxe-Coburg and Gotha – 6 May 1894, Schloss Biederstein, Schwabing, Munich, Kingdom of Bavaria) was a Princess of Saxe-Coburg and Gotha by birth and a Duchess in Bavaria through her marriage to Duke Maximilian Emanuel in Bavaria. Amalie was the fourth child and second eldest daughter of Prince August of Saxe-Coburg and Gotha and his wife Princess Clémentine of Orléans. Her youngest brother was Ferdinand I of Bulgaria.
Document 3: Princess Alexandra of Sayn-Wittgenstein-Berleburg: Princess Alexandra of Sayn-Wittgenstein-Berleburg, Countess von Pfeil und Klein-Ellguth (Alexandra Rosemarie Ingrid Benedikte; born 20 November 1970 in Copenhagen, Denmark), is the first daughter and second of three children of Prince Richard of Sayn-Wittgenstein-Berleburg and Princess Benedikte of Denmark).
Document 4: Prince Leopold, Duke of Albany: Prince Leopold, Duke of Albany, (Leopold George Duncan Albert; 7 April 185328 March 1884) was the eighth child and youngest son of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha. Leopold was later created Duke of Albany, Earl of Clarence, and Baron Arklow. He had haemophilia, which led to his death at the age of 30.
Document 5: Ernst I, Prince of Hohenlohe-Langenburg: Ernst Christian Carl, 4th Prince of Hohenlohe-Langenburg (May 7, 1794 – April 12, 1860), was a brother-in-law of Queen Victoria of the United Kingdom. He was the son of Prince Charles Louis of Hohenlohe-Langenburg and Countess Amalie Henriette of Solms-Baruth.
Document 6: Princess Alexandra of Saxe-Coburg and Gotha: Princess Alexandra of Saxe-Coburg and Gotha, , (Alexandra Louise Olga Victoria; 1 September 1878 – 16 April 1942), was the fourth child and third daughter of Alfred, Duke of Edinburgh and Grand Duchess Maria Alexandrovna of Russia. She was a granddaughter of Queen Victoria of the United Kingdom as well as of Tsar Alexander II of Russia.
Document 7: Princess Margaretha of Saxony: Princess Margaretha of Saxony, Duchess of Saxony (German: "Prinzessin Margaretha Karoline Friederike Cecilie Auguste Amalie Josephine Elisabeth Maria Johanna von Sachsen, Herzogin zu Sachsen" ) (24 May 1840 – 15 September 1858) was the eighth child and fifth eldest daughter of John of Saxony and his wife Amalie Auguste of Bavaria and a younger sister of Albert of Saxony and George of Saxony. She was born in Dresden, then in the Kingdom of Saxony. Through her marriage to Archduke Charles Louis of Austria, Margaretha was a member of the House of Habsburg-Lorraine and an Archduchess and Princess of Austria and Princess of Hungary, Croatia, Bohemia, and Tuscany.
Document 8: Saxe-Coburg and Gotha: Saxe-Coburg and Gotha (German: "Sachsen-Coburg und Gotha" ), or Saxe-Coburg-Gotha, was an Ernestine duchy ruled by a branch of the House of Wettin, consisting of territories in the present-day states of Bavaria and Thuringia in Germany. It lasted from 1826 to 1918.
Document 9: Andreas, Prince of Saxe-Coburg and Gotha: Andreas, Prince of Saxe-Coburg and Gotha, Duke of Saxony (given names: "Andreas Michael Friedrich Hans Armin Siegfried Hubertus"; born 21 March 1943) has been the head of the House of Saxe-Coburg and Gotha since 1998. He is the grandson of Charles Edward, Duke of Saxe-Coburg and Gotha, the last ruling duke.
Document 10: Princess Alexandrine of Baden: Princess Alexandrine of Baden (Alexandrine Luise Amalie Friederike Elisabeth Sophie; 6 December 1820 – 20 December 1904) was the Duchess of Saxe-Coburg and Gotha as the wife of Ernest II. She was born the eldest child of Leopold, Grand Duke of Baden and his wife Princess Sophie of Sweden.
Document 11: List of heirs to Saxe-Coburg and Gotha: In the redistribution of land among the Ernestine duchies that followed the death of the last Duke of Saxe-Gotha-Altenburg on 11 February 1825, the late Duke's nephew-in-law, Duke Ernst III of Saxe-Coburg-Saalfeld, received Gotha, while he ceded Saalfeld to the Duke of Saxe-Meiningen. On 12 November 1826 he thus became Ernst I of Saxe-Coburg and Gotha. The duchies of Saxe-Coburg and Saxe-Gotha remained in personal union until 1852, when a political union was effected.
Document 12: Alfred, Duke of Saxe-Coburg and Gotha: Alfred (Alfred Ernest Albert; 6 August 184430 July 1900) reigned as Duke of Saxe-Coburg and Gotha from 1893 to 1900. He was the second son and fourth child of Queen Victoria of the United Kingdom and Prince Albert of Saxe-Coburg and Gotha. He was known as the Duke of Edinburgh from 1866 until he succeeded his paternal uncle Ernest II as the reigning Duke of Saxe-Coburg and Gotha in the German Empire.
Document 13: Ernest II, Duke of Saxe-Coburg and Gotha: Ernest II (German: "Ernst August Karl Johann Leopold Alexander Eduard"; 21 June 1818 – 22 August 1893) was the sovereign duke of the Duchy of Saxe-Coburg and Gotha, reigning from 1844 to his death. Ernest was born in Coburg as the eldest child of Ernest I, Duke of Saxe-Coburg-Saalfeld, and his duchess, Princess Louise of Saxe-Gotha-Altenburg. Fourteen months later, his younger brother Prince Albert was born, who became consort of Queen Victoria of the United Kingdom. Ernest's father became Duke of Saxe-Coburg and Gotha in 1826 through an exchange of territories.
Document 14: Ernest II, Duke of Saxe-Gotha-Altenburg: Ernest II, Duke of Saxe-Gotha-Altenburg (Gotha, 30 January 1745 – Gotha, 20 April 1804) was the reigning Duke of Saxe-Gotha-Altenburg from 1772 to 1804. He was the third but second surviving son of Frederick III, Duke of Saxe-Gotha-Altenburg and Luise Dorothea of Saxe-Meiningen. The death of his older brother Frederick in 1756 made him the heir to the duchy of Saxe-Gotha-Altenburg.
Document 15: Princess Dorothea of Saxe-Coburg and Gotha: Princess Dorothea Maria Henriette Auguste Louise of Saxe-Coburg and Gotha (30 April 1881 – 21 January 1967) was a princess of Saxe-Coburg and Gotha (German: "Prinzessin von Sachsen-Coburg und Gotha" ) by birth and the duchess of Schleswig-Holstein (German: "Herzogin zu Sachsen" ) through her marriage to Ernst Gunther, duke of Schleswig-Holstein. Dorothea was born in Vienna, Austria, the second child and only daughter of Prince Philipp of Saxe-Coburg and Gotha and Princess Louise of Belgium.
ground_truth: Sweden