Algernon Percy, 10th Earl of Northumberland, 4th Baron Percy,, was an English aristocrat, and supporter of the Parliamentary cause in the First English Civil War.
Portrait by Anthony van Dyck
Algernon Percy
Dorothy Percy, Countess of Northumberland was the younger daughter of Walter Devereux, 1st Earl of Essex by Lettice Knollys, and the wife of Henry Percy, 9th Earl of Northumberland. Lady Dorothy Percy
Algernon Percy, 10th Earl of Northumberland
…October 1668. Algernon Percy was the third, but eldest surviving, son of Henry Percy, 9th Earl of Northumberland, the so-called 'Wizard Earl.' His mother Dorothy was sister of Robert Devereux, 2nd Earl of Essex, executed for treason in 1601. The marriage was not a success; Henry claimed the terms of the marriage…
Portrait identified as Dorothy Devereux (on the left) and her elder sister Penelope Devereux, c.1581