British, born in United Kingdom
Dorothy Sidney, Countess of Leicester, was a person from the United Kingdom of Great Britain and Ireland. Born in Northumberland in 1969, she was the daughter of Henry Percy, 9th Earl of Northumberland, and Dorothy Percy, Countess of Northumberland. Dorothy Sidney passed away on August 20, 1659 in Penshurst.
Dorothy Sidney had four children: Algernon Sidney, Henry Sydney, 1st Earl of Romney, Philip Sidney, 3rd Earl of Leicester, and Dorothy Spencer, Countess of Sunderland.