Eleanor Percy, Duchess of Northumberland
Eleanor Percy, Duchess of Northumberland( 1820–1911) was the wife of Algernon Percy, 4th Duke of Northumberland.
Anne Percy, Countess of Northumberland
Anne Percy, Countess of Northumberland( née Somerset; 1536 – 17 October 1596) was an English noblewoman and one of the instigators of the Northern Rebellion against Queen Elizabeth I of England.
To avoid punishment for her prominent role in the failed insurrection, Anne, along with her infant daughter, was forced into exile in Flanders, where she spent the rest of her life involving herself in Catholic plots and maintaining contact with the other English Catholic exiles.
In Liège while living on a pension from King Philip II of Spain, she wrote" Discours des troubles du Comte du Northumberland".
Her husband Thomas Percy, 7th Earl of Northumberland, who had led the rebellion, was executed for treason.
Three of her daughters were left behind in England and raised by their paternal uncle, Henry Percy, 8th Earl of Northumberland.
Dorothy Percy, Countess of Northumberland
Dorothy Percy (née Devereux), Countess of Northumberland (formerly Perrot, née Devereux; c. 1564 – 3 August 1619) was the younger daughter of Walter Devereux, 1st Earl of Essex by Lettice Knollys, and the wife of Henry Percy, 9th Earl of Northumberland.
Walter Devereux, 1st Earl of Essex
Walter Devereux, 1st Earl of Essex, KG (16 September 1541 – 22 September 1576), was an English nobleman and general.
From 1573 until his death he fought in Ireland in connection with the Plantation of Ulster, where he ordered the Rathlin Island massacre.
He was the father of Elizabeth
I's favourite of her later years, Robert Devereux, 2nd Earl of Essex.
Elizabeth Percy, Countess of Northumberland
Elizabeth Percy, Countess of Northumberland(" née" Wriothesley; 1646 – 19 September 1690), was a British courtier.
She was one of the Windsor Beauties, painted by Sir Peter Lely.
Dorothy Sidney, Countess of Leicester
Lady Dorothy Sidney( née Percy), Countess of Leicester(" née" Percy; ca. 1598 – 20 August 1659), was the eldest daughter of Henry Percy, 9th Earl of Northumberland, and his wife, Lady Dorothy Devereux.
Her sister was the alleged intrigant Lucy Hay, Countess of Carlisle, and their eldest surviving brother was Algernon Percy, 10th Earl of Northumberland.
Lady Dorothy
Percy married Robert Sidney, later Earl of Leicester, in 1615.
The couple had twelve children, including:
Mary Percy, Countess of Northumberland
Mary Percy, Countess of Northumberland(" née" Talbot; died 16 April 1572) was a courtier and noblewoman during the reign of Henry VIII of England.
She was the daughter of George Talbot, 4th Earl of Shrewsbury.
Her husband, Henry Percy, 6th Earl of Northumberland, had wished to marry Anne Boleyn instead of her.
Theodred II (Bishop of Elmham)
Theodred II was a medieval Bishop of Elmham.
The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997.
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.
Isabella Percy, Countess of Beverley
Isabella Susan Percy, Countess of Beverley( 19 December 1750 – 24 January 1812), formerly Isabella Susan( or Susannah) Burrell, was the wife of Algernon Percy, 1st Earl of Beverley, and the mother of the 5th Duke of Northumberland.
Isabella was the second daughter of Peter Burrell, a barrister, of Beckenham, Kent, and his wife, the former Elizabeth Lewis.
Her brother was Peter Burrell, 1st Baron Gwydyr.
Two of her sisters married into the aristocracy: Elizabeth, who married the Duke of Hamilton( and later the Marquess of Exeter), and Frances, who became Duchess of Northumberland.
Isabella married the future earl on 8 June 1775, by special licence, at Syon House in London.
Their children were:
In 1786, Percy inherited the title of Lord Lovaine, and his wife became Lady Lovaine.
In 1790, he was created 1st Earl of Beverley, and his wife became Countess of Beverley.
The countess died in 1812, aged 61, and was buried in the Northumberland Vault at Westminster Abbey.
The Earl of Beverley died in October 1830, aged 80, and was succeeded by his eldest son, George, who later inherited the dukedom of Northumberland from his cousin, the 4th Duke, in 1865.

Question: What is the date of death of Dorothy Percy, Countess Of Northumberland's father?
Answer: 22 September 1576