Elizabeth Monck, Duchess of Albemarle known as "the Mad Duchess of Albemarle" (1654–1734) Parents Henry Cavendish, 2nd Duke of Newcastle Frances Pierrepont Children Siblings Lady Arabella Cavendish Henry Cavendish, Earl of Ogle Margaret Holles, Duchess of Newcastle-upon-Tyne Lady Frances Cavendish Lady Catherine Cavendish Partners Ralph Montagu, 1st Duke of Montagu Christopher Monck, 2nd Duke of Albemarle
