Horatio Walpole, 3rd Earl of Orford British politician (1783-1858) (1783–1858) Parents Sophia Churchill Horatio Walpole, 2nd Earl of Orford Children Rachel Katherine, Viscountess Pollington Dorothy Nevill Horatio Walpole, 4th Earl of Orford Henry Walpole Frederick Walpole Siblings Lady Catharine Long John Walpole Lady Georgiana Mary Walpole Charlotte Walpole Frederick Charles Walpole Ann Walpole Lady Sophia Anne Walpole Lady Maria Walpole Lady Harriet Walpole Partners Mary Fawkener