Who married Princess Sophie of Saxe-Coburg-Saalfeld?

Princess Sophie Friederike Karoline Luise of Saxe-Coburg-Saalfeld (16 August 1778 – 9 July 1835) was a princess of Saxe-Coburg-Saalfeld, the sister of Princess Victoria of Saxe-Coburg-Saalfeld and King Leopold I of Belgium, and the maternal aunt of Queen Victoria. By marriage, she was the Countess of Mensdorff-Pouilly.

She was born in Coburg, the eldest child of Francis, Duke of Saxe-Coburg-Saalfeld by his second wife, Countess Augusta Reuss of Ebersdorf.

Emmanuel Graf von Mensdorff-Pouilly (24 January 1777 – 28 June 1852) was an army officer in the Imperial-Royal Army of the Austrian Empire, and vice-governor of Mainz. He was the uncle of Queen Victoria and the godfather of her husband, Prince Albert of Saxe-Coburg and Gotha.