All Artists
O'Nei - Orivi
- O'Neill, Henry Nelson (1817-1880)
- O'Neill, Hugh (1784-1824)
- O'Neill, Terry (b. 1938)
- Onet, E.
- Ong, Jimmy (b. 1964)
- Ongania, Umberto
- Ongenae, Josef (1921-1993)
- Ongert, Johannes
- Ongjert, Johannes II
- Onishi, Shigeru (b. 1928)
- Onkenhout, Nico (1918-1989)
- Onko, Jiun (1718-1804)
- Onnes, Menso Kamerlingh (1860-1925)
- Ono, Yoko (b. 1933)
- Onodera, Yuki (b. 1962)
- Onofri, Crescenzio (1632-1712)
- Onoike, Tomoko (B. 1960)
- Onsberg, Ulf (b. 1932)
- Onslow-Ford, Gordon (b. 1912)
- Onsoy, Kemal (b. 1954)
- Ontani, Luigi (b. 1943)
- Onurmen, Irfan (b. 1958)
- Onus, Lin (1948-1996)
- Ooms, Karel (1845-1900)
- Oorebeek, Willem (b. 1953)
- Oosterwijk, Johannes
- Oosterwijk, Severijn
- Oosterwyk, Johannes
- Oosting, Jeanne Bieruma (1898-1995)
- Oostvogel, Leonie
- Op de Beeck, Hans (b. 1969)
- op ten Noort, Gijsberus Nonus (1821-1870)
- Opalka, Roman (1931-2011)
- Opazo, Rodolfo (b. 1935)
- Opdenhoff, George Willem (1807-1875)
- Opfermann, Karl (1891-1960)
- Opgenorth, Harvey (b. 1977)
- Ophagen, Hans
- Ophir, Gilad (b. 1957)
- Ophuis, Ronald (b. 1968)
- Opie, Catherine (b. 1961)
- Opie, Edward (1810-1894)
- Opie, John (1761-1807)
- Opie, Julian (b. 1958)
- Opitz, Georg Emanuel (1775-1841)
- Opitz-Axterer, Ingrid (b.1941)
- Opiz, G.
- Oppel, Martin (b. 1976)
- Oppenheim, A.
- Oppenheim, Dennis A. (1938-2011)
- Oppenheim, Meret (1913-1985)
- Oppenheim, Moritz Daniel (1800-1882)
- Oppenheimer, Charles (1875-1961)
- Oppenheimer, Josef (1876-1966)
- Oppenheimer, Max (1885-1954)
- Oppenoorth, Willem Johannes (1847-1905)
- Oppenord, Gilles-Marie (1672-1742)
- Oppenordt, Alexandre-Jean
- Oppenordt, Gilles Marie (1672-1742)
- Oppi, Ubaldo (1889-1946)
- Oppler, Ernst (1867-1929)
- Oppo, Cipriano Efisio (1891-1962)
- Oprandi, Giorgio (1883-1963)
- Opsomer, Isidore Henri Edmond (1878-1967)
- Opus One
- Oram, Ann (b. 1956)
- Oram, Edward (1766-1799)
- Orange, Maurice Henri (1868-1916)
- Orant, Marthe (1874-1953)
- Orazio
- Orban, Desiderius (1884-1986)
- Orbin, C. E.
- Orcagna, Andrea di Cione (c.1315-1368)
- Orchard, Danielle (b. 1985)
- Orchard, John
- Orchardson, Charles M. Quiller (1873-1917)
- Orchardson, Richard (b. 1976)
- Orchardson, William Quiller (1832-1910)
- Orchart, Stanley J.
- Orczy, Emma (1865-1947)
- Ordie
- Ordner, Paul (1900-1969)
- Ordóñez, Sylvia (b. 1956)
- Oregna, E.
- O'Reilly, Joseph
- O'Reilly, Tim (b. 1965)
- Orfei, Orfeo (1836-1915)
- Orfevrerie, Jacob
- Orgacom
- Organ, Bryan (b. 1935)
- Organ, Robert
- Orhon, Mubin (1924 - 1981)
- Oriani, Pippo (1909-1972)
- Oring, Johannes
- Orioli, Pietro Di Degli Francesco (1458-1496)
- O'Riordan, Violet
- Oris
- Orisa
- Oritsu, Maruyama (1817-1875)
- Orivit
Please note that lot results for an artist may include approximate matches such as Attributed to, School of, Studio of, Circle of, Style of, Manner of, etc.