 As Grandison had no son, he was succeeded by a younger brother, John Villiers.After the Restoration, Grandison's only child, Barbara Villiers, became a royal mistress of King Charles II, in 1670 was created Duchess of Cleveland, and became the ancestor of several noble families, including the Dukes of Grafton.Grandison's mother, Barbara Lady Villiers, born about 1592, lived into her eighties and saw the Restoration and the early years of her great-grandchildren.