Caroline Louisa Cavendish-Bentinck (née Burnaby; baptised 5 December 1832 – 6 July 1918) was the maternal grandmother of Queen Elizabeth The Queen Mother and a great-grandmother of Queen Elizabeth II.

Caroline Louisa Burnaby was born at Baggrave Hall, near Hungarton, Leicestershire on 23 November 1832.^[1] She was a daughter of Edwyn Burnaby of Baggrave Hall and his wife, the former Anne Caroline Salisbury.^[2] She was baptised on 5 December 1832 at Hungarton, Leicestershire.^[3] She was a sister of Edwyn Burnaby, a first cousin of Frederick Gustavus Burnaby, and an aunt of Algernon Burnaby.

Louisa Burnaby married the Rev. Charles Cavendish-Bentinck, as his second wife, on 13 December 1859.^[4] Rev. Cavendish-Bentinck was the elder son of Lieutenant Colonel Lord Charles Bentinck and Anne Wellesley, formerly Lady Abdy.^[5] His paternal grandparents were William Cavendish-Bentinck, 3rd Duke of Portland, Prime Minister of Great Britain, and Dorothy Cavendish, a daughter of William Cavendish, 4th Duke of Devonshire. Together Louisa and Charles were the parents of three children:

• Cecilia Nina Cavendish-Bentinck (1862–1938), who married Claude Bowes-Lyon, 14th Earl of Strathmore and Kinghorne.^[6]
• Ann Violet Cavendish-Bentinck (1864–1932).
• Hyacinth Cavendish-Bentinck (1864–1916); who married an American, Augustus Edward Jessup, a son of Alfred Dupont Jessup. Augustus was the widower of Lady Mildred Marion Bowes-Lyon.

After her first husband's death in 1865, she married Henry Warren Scott, the son of Sir William Scott, 6th Baronet, of Ancrum, on 30 September 1870.^[4] He died on 23 August 1889 at Forbes House, Ham, Surrey,^[7] and was buried in St Andrew's Church, Ham.^[8]

Louisa Scott, died aged 85, twice widowed, on 6 July 1918 at Dawlish, Devon.^[9]

Through her eldest daughter Cecilia, the Countess of Strathmore and Kinghorne, she was a grandmother of Queen Elizabeth the Queen Mother and thus the great-grandmother of Queen Elizabeth II.^[10]