Sir Horatio George Walpole (1843-1923) (1843–1923) Parents Spencer Horatio Walpole Isabella Perceval Children Margaret Walpole Reginald Horace Walpole Robert Spencer Hobhouse Walpole Siblings Spencer Walpole Isabella Mararetta Elizabeth Walpole Jane Margaret Walpole unknown daughter Walpole Partners Selina Maria Perceval