Dorothy Percy, Countess of Northumberland

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Dorothy Devereux
Countess of Northumberland
Portrait identified as Dorothy Devereux (on the left) and her elder sister Penelope Devereux, c.1581
Born	c.1564 Chartley Castle, Staffordshire, England
Died	3 August 1619 (aged 54–55)
Spouse(s)	Sir Thomas Perrot Henry Percy, 9th Earl of Northumberland
Issue	Penelope Perrot Dorothy Perrot Elizabeth Perrot Dorothy Percy Lucy Percy Algernon Percy, 10th Earl of Northumberland Henry Percy, Lord of Alnwick
Father	Walter Devereux, 1st Earl of Essex
Mother	Lettice Knollys

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.