Louisa Jane Montagu Douglas Scott, Duchess of Buccleuch and Queensberry (26 August 1836 – 16 March 1912) was the daughter of James Hamilton, 1st Duke of Abercorn. In 1884, she became the Duchess of Buccleuch and Duchess of Queensberry, the wife of William Henry Walter Montagu Douglas Scott, 6th Duke of Buccleuch and 8th Duke of Queensberry. She was the paternal grandmother of Princess Alice, Duchess of Gloucester, and of Marian Louisa, Lady Elmhirst, as well as a maternal great-grandmother of Prince William of Gloucester and Prince Richard, Duke of Gloucester, and a great-great-grandmother of Sarah, Duchess of York. Diana, Princess of Wales, is one of her great-great-great-nieces. Early life, marriage, and family Louisa Jane Hamilton was born on Friday 26 August 1836 in Brighton, Sussex, England, the third child of fourteen born to James Hamilton, 1st Duke of Abercorn, and the former Lady Louisa Russell, daughter of John Russell, 6th Duke of Bedford. She married William Montagu Douglas Scott, Earl of Dalkeith, on 22 November 1859 in London. Lord Dalkeith was the eldest son of the Walter Montagu Douglas Scott, 5th Duke of Buccleuch, and his wife, the former Lady Charlotte Thynne. They had six sons and two daughters: Walter Henry Montagu Douglas Scott, Earl of Dalkeith (17 January 1861 – 18 September 1886) John Charles Montagu Douglas Scott, 7th Duke of Buccleuch (30 March 1864 – 19 October 1935) Lord George William Montagu Douglas Scott (31 August 1866 – 23 February 1947); married on 30 April 1903 Lady Elizabeth Emily Manners (daughter of John Manners, 7th Duke of Rutland and Janetta Hughan) and had issue Lord Henry Francis Montagu Douglas Scott (15 January 1868 – 19 April 1945) Lord Herbert Andrew Montagu Douglas Scott (30 November 1872 – 17 June 1944); married 26 April 1905 Marie Josephine Edwards and had issue, maternal grandfather of Sarah, Duchess of York Lady Katharine Mary Montagu Douglas Scott (25 March 1875 – 7 March 1951); married Thomas Brand, 3rd Viscount Hampden, and had issue Lady Constance Anne Montagu Douglas Scott (10 March 1877 – 7 May 1970); married on 21 January 1908 The Hon. Douglas Halyburton Cairns (son of Hugh Cairns, 1st Earl Cairns and Mary Harriet McNeill) and had issue Lord Francis George Montagu Douglas Scott (1 November 1879 – 26 July 1952); married on 11 February 1915 Lady Eileen Nina Evelyn Sibell Elliot-Murray-Kynynmound (daughter of Gilbert Elliot-Murray-Kynynmound, 4th Earl of