Frances Percy, Duchess of Northumberland

Frances Julia Percy, Duchess of Northumberland (née Burrell; 21 December 1752 – 28 April 1820) was the second wife of Hugh Percy, 2nd Duke of Northumberland, and the mother of the 3rd and 4th Dukes.

Frances was a daughter of the barrister Peter Burrell, of Beckenham, Kent, and his wife, the former Elizabeth Lewis. Her brother was Peter Burrell, 1st Baron Gwydyr, and two of her sisters also married into the aristocracy: Elizabeth, who married the Duke of Hamilton (and later the Marquess of Exeter), and Isabella, who became Countess of Beverley. Isabella's husband, Algernon, was the brother of Frances's husband, Hugh.