Rachel Katherine, Viscountess Pollington (1825-1854), Daughter of 3rd Earl of Orford; first wife of 4th Earl of Mexborough (1825–1854) Parents Horatio Walpole, 3rd Earl of Orford Mary Fawkener Children John Horace Savile, 5th Earl of Mexborough of Lifford Siblings Frederick Walpole Henry Walpole Horatio Walpole, 4th Earl of Orford Dorothy Nevill Partners John Savile, 4th Earl of Mexborough