Question: When did Hugh Percy, 10Th Duke Of Northumberland's father die?

Knowledge 1: Hugh Percy, 10th Duke of Northumberland
Hugh Algernon Percy, 10th Duke of Northumberland (6 April 1914 – 11 October 1988), was the son of Alan Percy, 8th Duke of Northumberland, and Lady Helen Gordon-Lennox.He succeeded to the dukedom of Northumberland in 1940, when his brother Henry, the 9th Duke, was killed in Belgium in World War II during the retreat to Dunkirk. [SEP] Knowledge 2: Alan Percy, 8th Duke of Northumberland
Alan Ian Percy, 8th Duke of Northumberland, (17 April 1880 – 23 August 1930) was a British army officer.
Knowledge 1: Hugh Percy, 10th Duke of Northumberland
Hugh Algernon Percy, 10th Duke of Northumberland (6 April 1914 – 11 October 1988), was the son of Alan Percy, 8th Duke of Northumberland, and Lady Helen Gordon-Lennox.He succeeded to the dukedom of Northumberland in 1940, when his brother Henry, the 9th Duke, was killed in Belgium in World War II during the retreat to Dunkirk. [SEP] Knowledge 2: James Stewart-Murray, 9th Duke of Atholl
James Thomas Stewart- Murray, 9th Duke of Atholl, 14th Baron Strange, 8th Baron Percy( 18 August 1879 – 8 May 1957), styled Lord James Stewart- Murray until 1942, was a Scottish peer and soldier.Stewart- Murray was the fourth and youngest son of John Stewart- Murray, 7th Duke of Atholl, and Louisa Moncreiffe, daughter of Thomas Moncreiffe of that Ilk, 7th Baronet.He was educated at Eton and commissioned a second lieutenant in the 1st Battalion of the Queen's Own Cameron Highlanders on 3 January 1900.The following month, he left for South Africa to fight in the Second Boer War, where he was mentioned in despatches and won two medals and six clasps.He later fought in the First World War, where he was wounded, captured, and held as a Prisoner of War, and resigned from the army as a major.He became a Freemason in Lodge St. John, No. 14( now the United Lodge of Dunkeld) at the same time as his elder brother George in 1914.In 1942, aged 62, he succeeded his elder brother John Stewart- Murray, 8th Duke of Atholl in the dukedom.Atholl died unmarried in May 1957, aged 77.On his death, the barony of Strange fell into abeyance while the barony of Percy was passed on to his kinsman Hugh Percy, 10th Duke of Northumberland.The baronies of Murray and Glenlyon and earldom of Strange became extinct.He was succeeded in the dukedom of Atholl and in other Scottish titles by a distant relative, Iain Murray, 10th Duke of Atholl, his fourth cousin twice removed, who was descended from George Murray, Bishop of St David's, second son of the eighteenth century 3rd Duke.
Knowledge 1: James Stewart-Murray, 9th Duke of Atholl
James Thomas Stewart- Murray, 9th Duke of Atholl, 14th Baron Strange, 8th Baron Percy( 18 August 1879 – 8 May 1957), styled Lord James Stewart- Murray until 1942, was a Scottish peer and soldier.Stewart- Murray was the fourth and youngest son of John Stewart- Murray, 7th Duke of Atholl, and Louisa Moncreiffe, daughter of Thomas Moncreiffe of that Ilk, 7th Baronet.He was educated at Eton and commissioned a second lieutenant in the 1st Battalion of the Queen's Own Cameron Highlanders on 3 January 1900.The following month, he left for South Africa to fight in the Second Boer War, where he was mentioned in despatches and won two medals and six clasps.He later fought in the First World War, where he was wounded, captured, and held as a Prisoner of War, and resigned from the army as a major.He became a Freemason in Lodge St. John, No. 14( now the United Lodge of Dunkeld) at the same time as his elder brother George in 1914.In 1942, aged 62, he succeeded his elder brother John Stewart- Murray, 8th Duke of Atholl in the dukedom.Atholl died unmarried in May 1957, aged 77.On his death, the barony of Strange fell into abeyance while the barony of Percy was passed on to his kinsman Hugh Percy, 10th Duke of Northumberland.The baronies of Murray and Glenlyon and earldom of Strange became extinct.He was succeeded in the dukedom of Atholl and in other Scottish titles by a distant relative, Iain Murray, 10th Duke of Atholl, his fourth cousin twice removed, who was descended from George Murray, Bishop of St David's, second son of the eighteenth century 3rd Duke. [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.

Answer: 23 August 1930