Mary Compton English countess; (1669-1691) (1669–1691) Parents Mary Noel James Compton, 3rd Earl of Northampton Children Lionel Sackville, 1st Duke of Dorset Lady Mary Sackville Siblings George Compton, 4th Earl of Northampton Spencer Compton, 1st Earl of Wilmington Lady Alethea Compton Partners Charles Sackville, 6th Earl of Dorset
