Catherine Cavendish, Duchess of Devonshire (née Hoskins, 1700 – 8 May 1777), was the wife of William Cavendish, 3rd Duke of Devonshire, and mother of the 4th Duke.
[4] She married Cavendish, then an MP and known as the Marquess of Hartington, on 27 March 1718.
[9] They employed William Kent to design their new residence,[10] which stood until the 1920s, when much of the contents was transferred to Chatsworth House, the family seat in Derbyshire.
The duke died in 1755 and was succeeded by their eldest son, William, to whose marriage to the exceptionally wealthy Lady Charlotte Boyle Catherine was bitterly opposed.
However, at her husband's death, since Charlotte had died the previous year and the young duke did not remarry, Catherine remained mistress of Chatsworth[11] until her grandson, the 5th Duke, married 17-year-old Georgiana Spencer in 1774.