Elizabeth Bentinck

Elizabeth Thynne, Marchioness of Bath (née Lady Elizabeth Bentinck), was born on 27 July 1735 at Welbeck Abbey. She was the daughter of William Bentinck, 2nd Duke of Portland, and Lady Margaret Harley. Her paternal grandparents were Henry Bentinck, 1st Duke of Portland, and Lady Elizabeth Noel, daughter of the 2nd Earl of Gainsborough. Her maternal lineage included Lady Henrietta Holles, the only surviving child and heir of the 2nd Earl of Oxford and Mortimer, and granddaughter of the 1st Duke of Newcastle-upon-Tyne.

On 22 March 1759, she married Thomas Thynne, who was then the 3rd Viscount Weymouth, at St. Margaret's Church in Westminster. Upon her marriage, she was styled as Viscountess Weymouth. The couple had eight children: Lady Louisa Thynne (1760–1832), who married Heneage Finch, 4th Earl of Aylesford; Lady Henrietta Thynne (1762–1813), who married Philip Stanhope, 5th Earl of Chesterfield; Lady Sophia Thynne (1763–1791), who married George Ashburnham, 3rd Earl of Ashburnham; Thomas Thynne (1765–1837), who became the 2nd Marquess of Bath, married Hon. Isabella Byng; George Thynne (1770–1838), who became the 2nd Baron Carteret of Hawnes, married Hon. Harriet Courtenay; John Thynne (1772–1849), who became the 3rd Baron Carteret of Hawnes, married Mary Anne Master; Lady Mary Thynne (1778–1814), married Osborne Markham; and Lady Isabella Thynne (1780–1810).

In 1789, her husband succeeded to the Marquessate, and she became the Marchioness of Bath. Elizabeth Thynne died on 12 December 1825 at the age of 90 at Lower Grosvenor Street in London.

Her court service began in 1761 when she was appointed as a Lady of the Bedchamber to Charlotte of Mecklenburg-Strelitz, queen consort of King George III. She served in this role until 1793. In 1793, following the death of her predecessor Mary Bertie, Duchess of Ancaster and Kesteven, she was appointed Mistress of the Robes to Queen Charlotte. She held this position until 1818, when Queen Charlotte died. She was succeeded in the role by Catherine Osborne, Duchess of Leeds.