Henrietta Howard, Countess of Suffolk b. circa 1669/70, d. 10 August 1715 (1669–1715) Parents Henry Somerset, 1st Duke of Beaufort Mary Somerset, Duchess of Beaufort Children Mary O'Brien Henry O'Brien, 8th Earl of Thomond Siblings Mary Butler, Duchess of Ormond Henry Somerset Lord Edward Somerset Elizabeth Somerset Charles Somerset, Marquess of Worcester Lord Arthur Somerset Anne Coventry Henry Somerset, Lord Herbert Lady Elizabeth Seymour William Seymour, 3rd Duke of Somerset Partners Henry Horatio O'Brien, Lord O'Brien Henry Howard, 6th Earl of Suffolk