O
O'CONNOR, James Arthur
O'CONNOR, Roderic
O'NEIL, Henry Nelson
O'NEILL, Rose C.OLDHAM, Elisabeth
OLIVER, Isaac
OLIVER, Isaac OLIVER, Peter (achevé par)OLIVER, Isaac?
OLIVIER, Herbert ArnouldOPIE, John (attribué à)ORCHARDSON, Sir Wiliam Quiller
ORDE, Cuthebert
ORPEN, Sir William
OTLEY, William Young
OWEN, Samuel