Her Wikipedia article is here. She married three times, the third time to Charles Seymour, 6th Duke of Somerset. Previously, she had married Henry Cavendish, making her Countess of Ogle, and then Thomas Thynne. Thomas Thynne was murdered by thugs hired by Swedish Count Karl Johann von Königsmark. She was the daughter of Lady Elizabeth Wriothesley. She had four children, all by Charles Seymour.