O’Brien, William
O’Connor, Thomas Power, M.P.
Occam, William of
Occleve, Thomas
Ogilby, John
Oliphant, Laurence
Oliphant, Mrs. Margaret
Opie, Amelia
Otway, Thomas
Ouida
Overbury, Sir Thomas
Owen, John, D.D.
Owen, Sir Richard, K.C.B.
Owen, Robert
Owen, Robert Dale