Mary Sheffield (died 1729) (d. 1729) Parents Ursula Stawel John Sheffield, 1st Duke of Buckingham and Normanby Children James Annesley Siblings Sir Charles Sheffield, 1st Baronet Katharine Sophia Herbert Edmund Sheffield, 2nd Duke of Buckingham and Normanby John Sheffield, Marquess of Normanby Robert Sheffield Charlotte Herbert Partners Arthur Annesley, 4th Baron Altham