Dorothy was born in about 1564, the daughter of Walter Devereux, 1st Earl of Essex and Lettice Knollys, a lady-in-waiting of Queen Elizabeth I of England. Her paternal grandparents were Sir Richard Devereux and Dorothy Hastings, after whom she was named. Her maternal grandparents were Sir Francis Knollys and Lady Catherine Carey, the daughter of Mary Boleyn, herself the sister of Queen consort Anne Boleyn. Dorothy had an elder sister Penelope Devereux, who was said to have been the inspiration for Sir Philip Sidney's sonnet sequence Astrophel and Stella. She had three younger brothers, Robert Devereux, 2nd Earl of Essex, Walter Devereux and Francis Devereux. In September 1576, Dorothy's father died in Dublin, Ireland of dysentery. Two years later, her mother married secondly and in secret, Queen Elizabeth's favourite Robert Dudley, Earl of Leicester, thus earning the wrath of the queen, who promptly banished her from court. The marriage produced one son Robert, Baron Denbigh who was born in 1581. The boy died at the age of three. In 1589, eleven months after Leicester's death, Dorothy acquired another stepfather, Sir Christopher Blount, who was thirteen years younger than her mother. On 25 February 1601, her brother Robert, 2nd Earl of Essex was beheaded at the Tower of London for treason. Unlike their sister Penelope, Dorothy was not suspected of playing any role in the rebellion. Essex denounced Penelope as a traitor, an act which shocked many, but did not accuse Dorothy.
Marriage and children
In July 1583 at Broxbourne Hertfordshire she married Sir Thomas Perrot of Haroldston. They had a son who predeceased his father without issue, and four daughters:
Dorothy Perrot, who married James Perrot of Wallingford, by whom she had two children.
Elizabeth Perrot.
Anne Perrot.
It was claimed in Sir Robert Naunton'sFragmenta Regalia that Dorothy's father-in-law, Sir John Perrot, was an illegitimate son of Henry VIII by his mistress Mary Berkeley. The marriage gave great offence to the Queen, whose consent should have been asked, but would almost certainly have been refused. She distrusted Sir John Perrot, who was to end his life as a convicted traitor under sentence of death in the Tower of London, and detested Dorothy's mother Lettice, whom she blamed for arranging the marriage. Thomas was imprisoned for a time and Dorothy was banished from Court. In 1587 Essex used his growing influence with the Queen in an attempt to restore his sister to favour, but due to the malicious interference of Sir Walter Raleigh, the result was another furious quarrel, ending with Essex and Dorothy leaving the house they were all staying in at midnight. Only after Perrot's death did the Queen consent to receive Dorothy at Court again, and she became something of a royal favourite. Dorothy married secondly, in 1594, Henry Percy, 9th Earl of Northumberland, known as "The Wizard Earl", but the marriage was not a success, and they later separated. In 1605, the earl was sent to the Tower of London on suspicion of involvement in the Gunpowder Plot, and he was not freed until after his wife's death. They had four children:
Dorothy is a minor character in the historical novelThe Grove of Eagles by Winston Graham. The narrator describes how her second husband, Northumberland, uses their marriage to heal the old quarrel between his wife and his close friend Sir Walter Raleigh, with the further aim of arranging a reconciliation between Raleigh and Dorothy's brother Essex.