"Maria, Duchess of Gloucester and Edinburgh (née Maria Walpole; 10 July 1736 – 22 August 1807) was Countess Waldegrave from 1759 to 1766 as the wife ...
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of James Waldegrave, 2nd Earl Waldegrave, and a member of the British royal family from 1766 as the wife of Prince William Henry, Duke of Gloucester and Edinburgh." - (en.wikipedia.org 12.08.2021)