Richard Sackville, 5th Earl of Dorset (16 September 1622 – 27 August 1677) was an English peer and politician. He was born at Dorset House, the second of three children of Edward Sackville, 4th Earl of Dorset and Mary Curzon, daughter and heiress of Sir George Curzon of Croxall Hall, Derbyshire. His elder sister Mary died in 1632; his younger brother Edward participated in the English Civil War, and was captured and killed by Parliamentary forces in 1646. More informatiom on the Wikipedia page here [1].