Background
Bentinck was the third son of Prime Minister William Cavendish-Bentinck, 3rd Duke of Portland and Lady Dorothy (1750–1794), daughter of Prime Minister William Cavendish, 4th Duke of Devonshire.
Bentinck was the third son of Prime Minister William Cavendish-Bentinck, 3rd Duke of Portland and Lady Dorothy (1750–1794), daughter of Prime Minister William Cavendish, 4th Duke of Devonshire.
Bentinck was returned to Parliament for Ashburton in 1806, a seat he held until 1812. He served under the Earl of Liverpool as Treasurer of the Household between 1812 and 1826. Bentinck married, firstly, Georgiana Augusta Frederica Seymour (baptized Elliott) (1782-1710 December 1813), daughter of the courtesan Mrs Grace Elliott on 21 September 1808.
She was said to be a daughter of the Prince of Wales or of the 4th Earl of Cholmondeley, both men claiming her paternity.
They had one daughter, who was raised after Georgiana"s death by Lord Cholmondeley, according to the entry on Grace Elliott. The marriage enabled Bentinck to become Treasurer of the Household in 1812, a position he held till death, despite his involvement in a notorious divorce suit and his subsequent remarriage.
They had four children:
Anne Cavendish-Bentinck (d 7 June 1888)
Emily Cavendish-Bentinck (d 6 June 1850), married Henry Hopwood. Reverend Charles William Frederick Cavendish-Bentinck (1817–1865).
He was a great-grandfather of Queen Elizabeth World War II Lieutenant-General Arthur Cavendish-Bentinck (10 May 1819 – 11 December 1877).
(These damages were never paid by the impecunious Bentinck). During the discussion of the divorce bill, the customary provision against remarriage was struck out in the House of Lords. Bentinck died on 28 April 1826 at age 45.
4th United Kingdom Parliament.