Isabella Perceval (died 1886) (1801–1886) Parents Jane Wilson Spencer Perceval Children Isabella Mararetta Elizabeth Walpole Spencer Walpole Jane Margaret Walpole unknown daughter Walpole Sir Horatio George Walpole Siblings Frances Perceval Ernest Augustas Perceval Frederica Elizabeth Perceval Louise Perceval Henry Perceval Dudley Montagu Perceval Maria Perceval John Thomas Perceval Spencer Perceval Jane Perceval Frederick James Perceval Michael Henry Perceval Partners Spencer Horatio Walpole