Louisa Jane Montagu Douglas Scott, Duchess of Buccleuch and Queensberry (; 26 August 1836 â 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. She served as Mistress of the Robes to Queen Victoria and then to Queen Alexandra.
Louisa Jane Hamilton was born on Friday 26 August 1836 in Brighton, Sussex, England, the third child of fourteen children 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:
She served as Mistress of the Robes to Queen Victoria from 1885 â 1892 (Conservative), and again from 1895 â 1901. She was appointed Mistress of the Robes to Queen Alexandra in 1901, a position in which she served until her death in 1912.
The duchess died on Saturday 16 March 1912, in her 76th year, at Dalkeith Palace, Midlothian, Scotland. She was survived by her husband, and seven of her children and their families. She was buried on Wednesday 20 March 1912 in the Buccleuch family crypt in St. Mary's Church, Dalkeith Palace, Midlothian, Scotland.