Question: When is Frances Percy, Duchess Of Northumberland's father's birthday?

Knowledge 1: Frances Percy, Duchess of Northumberland
Frances Julia Percy, Duchess of Northumberland (21 December 1752 – 28 April 1820), formerly Frances Julia Burrell, 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 sistersalso 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. [SEP] Knowledge 2: Peter Burrell (1724–1775)
Peter Burrell FRS (27 August 1724 – 6 November 1775) was a British politician and barrister.Born in London, he was the son of Peter Burrell and his wife Amy Raymond, daughter of Hugh Raymond.His uncle was Sir Merrick Burrell, 1st Baronet and his younger brother Sir William Burrell, 2nd Baronet.Burrell was educated at St John's College, Cambridge, and graduated with a Bachelor of Arts in 1745 and then with a Master of Arts.In 1749, he was called to the bar by Lincoln's Inn.Burrell sat as Member of Parliament (MP) in the British House of Commons for Launceston from 1759 to 1768 and subsequently for Totnes to 1774.In 1752, he was invested as a Fellow of the Royal Society, and in 1769, he was appointed Surveyor General of the Land Revenues of the Crown.On 28 February 1748, he married Elizabeth Lewis, daughter of John Lewis of Hackney; they lived at Langley Park.They had four daughters and a son, Peter, the later Baron Gwydyr.Their second daughter Isabella (1750–1812) married Algernon Percy, 1st Earl of Beverley, and was ancestor to the Dukes of Northumberland.Their third daughter Frances Julia Burrell married Hugh Percy, Second Duke of Northumberland in 1779, and was mother to both the Third Duke of Northumberland, also named Hugh, and Algernon Percy, Fourth Duke of Northumberland.Frances's husband and Isabella's husband were brothers, both sons of Hugh Percy, 1st Duke of Northumberland.Their fourth daughter, Elizabeth, married firstly Douglas Hamilton, 8th Duke of Hamilton and secondly Henry Cecil, 1st Marquess of Exeter.There was no issue from either marriage.
Knowledge 1: Frances Percy, Duchess of Northumberland
Frances Julia Percy, Duchess of Northumberland (21 December 1752 – 28 April 1820), formerly Frances Julia Burrell, 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 sistersalso 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. [SEP] Knowledge 2: Charlotte Percy, Duchess of Northumberland
Charlotte Florentia Percy, Duchess of Northumberland(" née" Lady Charlotte Florentia Clive; 12 September 1787 – 27 July 1866), was governess of the future Queen Victoria of the United Kingdom.
Knowledge 1: Frances Percy, Duchess of Northumberland
Frances Julia Percy, Duchess of Northumberland (21 December 1752 – 28 April 1820), formerly Frances Julia Burrell, 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 sistersalso 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. [SEP] Knowledge 2: Eleanor Percy, Duchess of Northumberland
Eleanor Percy, Duchess of Northumberland( 1820–1911) was the wife of Algernon Percy, 4th Duke of Northumberland.

Answer: 27 August 1724