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.
George FitzRoy, 1st Duke of Northumberland
Lieutenant-General George FitzRoy, 1st Duke of Northumberland, KG, PC (28 December 1665 – 28 June 1716) was the third and youngest illegitimate son of King Charles II of England; his mother was Barbara Villiers, Countess of Castlemaine (also known as Barbara Villiers, Duchess of Cleveland).
On 1 October 1674, he was created Earl of Northumberland, Baron of Pontefract (Yorkshire) and Viscount Falmouth (Cornwall).
On 6 April 1683, he was created Duke of Northumberland.
The first Duke of Northumberland was born at Merton College, Oxford.
In 1682, he was employed on secret service in Venice.
Upon his return to England in 1684, he was elected (10 January) and installed (8 April) Knight of the Garter.
That summer, he served as a volunteer on the side of the French at the Siege of Luxembourg.
In 1687, Northumberland commanded the 2nd Troop of Horse Guards.
A year later, he was appointed a lord of His Majesty's bedchamber.
In 1701, he was appointed Constable of Windsor Castle, in 1710 Lord Lieutenant of Surrey, and in 1712, he became Lord Lieutenant of Berkshire as well.
In 1703, he succeeded the Earl of Oxford as Colonel of the Royal Regiment of Horse.
Seven years later, on 10 January 1710, he became Lieutenant-General.
On 7 April 1713, he was sworn into the Privy Council and as Chief Butler of England.
In March 1686, Northumberland married Catherine Wheatley, the daughter of a poulterer, Robert Wheatley of Bracknell in Berkshire.
Catherine was the widow of Thomas Lucy of Charlecote Park, a captain in the Royal Horse Guards.
Soon after the marriage, Northumberland and his brother, Henry FitzRoy, 1st Duke of Grafton, allegedly attempted to privately convey her abroad to an English convent in Ghent, Belgium.
After the death of Catherine in 1714, Northumberland remarried to Mary Dutton, the sister of Captain Mark Dutton.
The Duke lived at Frogmore House at Windsor in Berkshire, but died suddenly aged 50 at Epsom on 28 June 1716.
He had no legitimate offspring.
Mary died at Frogmore House in 1738.
George Tailboys, 2nd Baron Tailboys of Kyme
George Tailboys( c. 1523 – c. 6 September 1540) was the eldest son of Elizabeth Blount and Gilbert Tailboys, 1st Baron Tailboys of Kyme.
Through his mother he was the half brother of Henry FitzRoy, 1st Duke of Richmond and Somerset, who was the only illegitimate offspring acknowledged by Henry VIII, King of England.
Eleanor Percy, Duchess of Northumberland
Eleanor Percy, Duchess of Northumberland( 1820–1911) was the wife of Algernon Percy, 4th Duke of Northumberland.
Charles II of England
Charles II (29 May 1630 – 6 February 1685) was king of England, Scotland, and Ireland.
He was king of Scotland from 1649 until his deposition in 1651, and king of England, Scotland and Ireland from the 1660 Restoration of the monarchy until his death.
Charles II was the eldest surviving child of Charles I of England, Scotland and Ireland and Henrietta Maria of France.
After Charles I's execution at Whitehall on 30 January 1649, at the climax of the English Civil War, the Parliament of Scotland proclaimed Charles II king on 5 February 1649.
However, England entered the period known as the English Interregnum or the English Commonwealth, and the country was a "de facto" republic led by Oliver Cromwell.
Cromwell defeated Charles II at the Battle of Worcester on 3 September 1651, and Charles fled to mainland Europe.
Cromwell became virtual dictator of England, Scotland and Ireland.
Charles spent the next nine years in exile in France, the Dutch Republic and the Spanish Netherlands.
A political crisis that followed the death of Cromwell in 1658 resulted in the restoration of the monarchy, and Charles was invited to return to Britain.
On 29 May 1660, his 30th birthday, he was received in London to public acclaim.
After 1660, all legal documents stating a regnal year did so as if he had succeeded his father as king in 1649.
Charles's English parliament enacted laws known as the Clarendon Code, designed to shore up the position of the re-established Church of England.
Charles acquiesced to the Clarendon Code even though he favoured a policy of religious tolerance.
The major foreign policy issue of his early reign was the Second Anglo-Dutch War.
In 1670, he entered into the Treaty of Dover, an alliance with his cousin King Louis XIV of France.
Louis agreed to aid him in the Third Anglo-Dutch War and pay him a pension, and Charles secretly promised to convert to Catholicism at an unspecified future date.
Charles attempted to introduce religious freedom for Catholics and Protestant dissenters with his 1672 Royal Declaration of Indulgence, but the English Parliament forced him to withdraw it.
In 1679, Titus Oates's revelations of a supposed Popish Plot sparked the Exclusion Crisis when it was revealed that Charles's brother and heir presumptive, James, Duke of York, was a Catholic.
The crisis saw the birth of the pro-exclusion Whig and anti-exclusion Tory parties.
Charles sided with the Tories, and, following the discovery of the Rye House Plot to murder Charles and James in 1683, some Whig leaders were executed or forced into exile.
Charles dissolved the English Parliament in 1681, and ruled alone until his death in 1685.
He was received into the Catholic Church on his deathbed.
Charles was one of the most popular and beloved kings of England, known as the "Merry Monarch", in reference to both the liveliness and hedonism of his court and the general relief at the return to normality after over a decade of rule by Cromwell and the Puritans.
Charles's wife, Catherine of Braganza, bore no live children, but Charles acknowledged at least twelve illegitimate children by various mistresses.
He was succeeded by his brother James.
Mary FitzRoy, Duchess of Richmond and Somerset
Mary FitzRoy, Duchess of Richmond and Somerset( Howard; 1519 – 7 December 1557), born Lady Mary Howard, was the only daughter- in- law of King Henry VIII of England, being the wife of his only acknowledged illegitimate son, Henry FitzRoy, 1st Duke of Richmond and Somerset.
Jane Percy, Duchess of Northumberland
Isobel Jane Miller Percy, Duchess of Northumberland( née Richard; born 11 May 1958), is a British businesswoman.
She has served as Lord Lieutenant of Northumberland since 2009, and is best known for redeveloping The Alnwick Garden at Alnwick Castle.
She is the first woman to serve as Lord Lieutenant of Northumberland.
Her husband, Ralph, is the 12th Duke of Northumberland.
Charles Lennox, 1st Duke of Richmond
Charles Lennox, 1st Duke of Richmond, 1st Duke of Lennox, 1st Duke of Aubigny( 29 July 167227 May 1723), of Goodwood House near Chichester in Sussex, was an illegitimate son of King Charles II by his mistress Louise de Kérouaille, Duchess of Portsmouth.
Hugh Percy, 1st Duke of Northumberland
Hugh Percy, 1st Duke of Northumberland,( c. 17146 June 1786), was an English peer, landowner, and art patron.
James FitzJames, 1st Duke of Berwick
James FitzJames, 1st Duke of Berwick, 1st Duke of Liria and Jérica, 1st Duke of Fitz- James( 21 August 1670 – 12 June 1734) was an Anglo- French military leader, illegitimate son of King James II of England by Arabella Churchill, sister of the 1st Duke of Marlborough.
Berwick was a successful general in the pay of Louis XIV of France.

Question: Where did George Fitzroy, 1St Duke Of Northumberland's father die?