Mary Somerset, Duchess of Beaufort English noblewoman, gardener and botanist (1630-1715) (1630–1715) Parents Elizabeth Morrison Arthur Capell, 1st Baron Capell of Hadham Children Henry Somerset Henry Somerset, Lord Herbert Charles Somerset, Marquess of Worcester Elizabeth Somerset Mary Butler, Duchess of Ormond Henrietta Howard, Countess of Suffolk Lady Elizabeth Seymour Lord Edward Somerset Lord Arthur Somerset William Seymour, 3rd Duke of Somerset Anne Coventry Siblings Theodosia Capell Arthur Capell, 1st Earl of Essex Elizabeth Capell Charles Capell Anne Capell Henry Capell, 1st Baron Capell of Tewkesbury Partners Henry Somerset, 1st Duke of Beaufort Henry Seymour, Lord Beauchamp