Dorothy Sidney, Countess of Leicester
|Countess of Leicester|
Lady Dorothy Percy
Dorothy Sidney, by Isaac Oliver
|Died||20 August 1659(aged 60–61)|
|Father||Henry Percy, 9th Earl of Northumberland|
|Mother||Dorothy Percy, Countess of Northumberland|
Dorothy Sidney, Countess of Leicester (née Lady Dorothy 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.
- Dorothy (1617–1683), married Henry Spencer, 1st Earl of Sunderland.
- Philip (1619–1697), the 3rd Earl, married Lady Catherine Cecil.
- Henry, created Earl of Romney, died unmarried and without issue.
- Algernon, died unmarried and without issue.
- Robert, died young.
- Lucy (died 1685), married Sir John Pelham, 3rd Baronet.
- Michael G. Brennan; Noel J. Kinnamon (15 May 2017). The Correspondence (c. 1626–1659) of Dorothy Percy Sidney, Countess of Leicester. Taylor & Francis. p. 9. ISBN 978-1-351-89233-9.
- Carole Levin; Anna Riehl Bertolet; Jo Eldridge Carney (3 November 2016). A Biographical Encyclopedia of Early Modern Englishwomen: Exemplary Lives and Memorable Acts, 1500-1650. Taylor & Francis. p. 178. ISBN 978-1-315-44071-2.
- Edmund Lodge (1835). Portraits of Illustrious Personages of Great Britain ... with Biographical and Historical Memoirs of Their Lives and Actions. Harding and Lepard. p. 19.