Vem gifte sig med William, Count of Schaumburg-Lippe?

Wilhelm, Count of Schaumburg-Lippe-Bückeburg (9 January 1724 – 10 September 1777), born Friedrich Wilhelm Ernst Graf zu Schaumburg-Lippe-Bückeburg, was a German ruler of the County of Schaumburg-Lippe-Bückeburg, an important military commander in the Seven Years' War, Generalfeldzeugmeister of the Electorate of Brunswick-Lüneburg, a British field marshal (Generalfeldmarschall) and the grandson of George I of Great Britain.