Henry Percy, 9th Earl of Northumberland, was born April 1564 to Henry Percy, 8th Earl of Northumberland (1532-1585) and Katherine Neville (1542-1596) and died 5 November 1632 of unspecified causes. He married Dorothy Devereux (1564-1619) 1594 .
|Offspring of Henry Percy, 9th Earl of Northumberland and Dorothy Devereux (1564-1619)|
|Dorothy Percy (1598-1659)||20 August 1598||20 August 1659||Robert Sidney, 2nd Earl of Leicester (1595-1677)|
|Lucy Percy (c1600-1660)|
|Algernon Percy, 10th Earl of Northumberland (1602-1668)||13 October 1602||13 October 1668||Anne Cecil (1612-1637) Anne Cecil (1612-1637) Elizabeth Howard (bef1629-1705)|
|Henry Percy (1604-1659)|