Elizabeth Thynne, Marchioness of Bath (née Lady Elizabeth Bentinck; 27 July 1735 – 12 December 1825), was a British courtier and the wife of Thomas Thynne, 1st Marquess of Bath. From 1761 to 1793, she was a Lady of the Bedchamber to Charlotte of Mecklenburg-Strelitz, queen consort of King George III of the United Kingdom. In 1793, as Dowager Marchioness, she became Mistress of the Robes and held that position until the Queen's death in 1818.
Early life.
She was born at Welbeck Abbey on 27 July 1735, the daughter of William Bentinck, 2nd Duke of Portland, and his wife, Lady Margaret Harley.
His paternal grandparents were Henry Bentinck, 1st Duke of Portland and his wife Lady Elizabeth Noel (daughter of the 2nd Earl of Gainsborough). His mother was the only surviving child of the 2nd Earl of Oxford and Mortimer, and the former Lady Henrietta Holles (the only child and heir of the 1st Duke of Newcastle-upon-Tyne). 
Personal life.
She married Thomas Thynne, then the 3rd Viscount Weymouth, on 22 March 1759 at St. Margaret's Church, Westminster, becoming Viscountess Weymouth. Their eight children were:
After her husband became Marquess of Bath in 1789, the viscountess became a marchioness. She died, aged 90, at Lower Grosvenor Street in London.
Court role.
From 1793 to 1818, she served as Mistress of the Robes to the Queen, succeeding Mary Bertie, Duchess of Ancaster and Kesteven. She was herself succeeded by Catherine Osborne, Duchess of Leeds.
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