Mary Sibell Ashley-Cooper English socialite, part of the Bright Young Things crowd (1902-1936) (1902–1936) Parents Constance Ashley-Cooper, Countess of Shaftesbury Anthony Ashley-Cooper, 9th Earl of Shaftesbury Children Mary Anna Marten Siblings Lady Dorothea Ashley-Cooper Anthony Ashley-Cooper, Lord Ashley John Ashley-Cooper Lettice Mildred Ashley-Cooper Partners Napier Sturt, 3rd Baron Alington
