Louisa Scott, Countess of Eldon
She was the daughter of Charles Duncombe, 1st Baron Feversham, by his wife, the former Lady Charlotte Legge. She married the earl on 1 October 1831, some years prior to his succeeding his grandfather in the earldom, when he was known as Viscount Encombe. They had a stillborn son in 1832 before successfully parenting a further seven children:
- Lady Selina Jane Scott (died 1891), who married Nathaniel Bond and had children
- Lady Rachel Adela Scott (died 1869), who died unmarried
- Lady Charlotte Elizabeth Scott (1834-1864), who married Rev. Canon Eldon Surtees Bankes and had children
- Lady Augusta Henrietta Scott (1836-1906), who married Thomas Francis Fremantle, 2nd Baron Cottesloe, and had children
- Lady Katherine Frances Scott (1837-1903), who married Gustavus Russell Hamilton-Russell, 8th Viscount Boyne
- Lady Gertrude Louisa Scott (died 1919), who married Lt.-Col. Lord Eustace Cecil and had children
- John Scott, 3rd Earl of Eldon (1845-1926)
She died, aged 45, in London, after a short illness. A few months later, Lord Eldon was found by a "Commission of Lunacy" to be of unsound mind. It was said that he had suffered from partial dementia since 1851 but that his wife "had managed the property of her husband, and had also managed him with great affection and tact". He survived the countess by two years and died in September 1854, aged 48. He was succeeded in the earldom by his only son, John.
- "Eldon, Earl of (UK, 1821)". Cracroft's Peerage. Retrieved 26 January 2018.
- G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 269.
- Mosley, Charles, editor. Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes. Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003. Page 1292.
- A Genealogical and Heraldic Dictionary of the Peerage and Baronetage of the British Empire. Henry Colburn. 1839. pp. 369–.
- The Gentleman's Magazine (London, England). F. Jefferies. 1838. pp. 319–.
- Chris Lloyd (20 May 2011). "Curate with a ladder was social climber". The Northern Echo. Retrieved 26 January 2018.
- "Commission of Lunacy on the Earl of Eldon". Hobart Town Daily Courier. 30 April 1853. Retrieved 26 January 2018.