- Obrien, C
- Obrien, C W
- O'Brien, Charles W
- O'brien, D P
- O'Brien, Deborah Mayer.
- O'Brien, E.
- O'Brien, E., Lt.-Col.
- O'Brien, Edward J., 1939-
- O'Brien, Eleanor
- O'Brien, Emma D
- O'Brien, Eris
- O'Brien, Frederick, 1869-1932
- O'Brien, George
- O'brien, H A
- O'Brien, Harry R.
- O'Brien, Heath E.
- O'Brien, Helen S.
- O'brien, J J
- O'brien, Jack
- O'brien, Jack J
- O'Brien, James
- O'brien, James F
- O'Brien, James T.
- O'Brien, Joseph G.
- O'Brien, Joseph J.
- O'brien, K G
- O'Brien, L B
- O'Brien, Lois
- O'Brien, Lois
- Obrien, M F
- O'Brien, M.
- O'Brien, M. F.
- O'Brien, Margaret (Margaret Elizabeth),
- O'brien, Maria
- O'Brien, Martha A.
- O'Brien, Martin
- O'brien, Megan A
- O'Brien, Michael, 1918-
- O'Brien, Morrough P. 1902-1988
- O'Brien, Muriel.
- O'Brien, Nicholas
- O'brien, P. A.
- O'Brien, P. A.
- O'Brien, Patricia C. M.
- O'brien, Patrick J.
- O'Brien, Patrick Y.
- O'Brien, Regina C., 1926-2010
- O'Brien, Renee A.
- O'Brien, Renee.
- O'Brien, Roderick
- O'Brien, Shannon
- O'brien, T P
- O'Brien, Teri P.
- O'Brien, Terry J.
- O'Brien, Timothy L.
- O'brien, W T
- Obrist, Martin
- Obritschkewitsch, Tim
- Obruchev, S. V. (Sergeĭ Vladimirovich) 1891-1965
- Obryan, L M
- Observations, Field
- Obsorn, Herbert
- Obst, Bryan S
- Obst, Ch
- Obst, J
- Obst, Matthias
- Obst, Maud Louise Mason.
- Obst, P
- Obuchi, Masami
- Obut, A M
- Obwoyere, Gilbert
- O'Byrne, J. M.
- O'Byrne, Joseph Francis.
- O'Byrne, Peter
- Obztarsov, Nicholas S
- Ocagne, Edmond d'.
- O'Callaghan, A M
- O'callaghan, D P
- O'callaghan, M
- O'callaghan, Michael G
- Ocampo Acosta, Gilberto
- Ocampo N., César.
- Ocampo S, Alexander
- Ocampo Serna, Diana Marcela.
- Ocampo, C L
- Ocampo, Carlos
- Ocampo, Federico
- Ocampo, Federico C
- Ocampo, Federico C.
- Ocampo, Federico Carlos
- Ocampo, John
- Ocampo, Rogelio
- Ocampo, Valentina
- Ocampos, Olinda E.
- Ocaña, Amelia
- Ocana, Oscar
- Ocana, Tercnce M J
- Ocaña-Luna, Alberto
- Ocaño, SF
- Ocantos, María Natalia
- Occhioni, Elena Maria de Lamare
- Occhioni, Gisele E.
- Occhioni, Paulo
- Occhipinti Ambrogi, A
- Occi, James
- Occi, James L
- Occidental Oil Shale, inc.
- Occidental Seed Company,
- Ocean Disposal of Reactor Wastes Woods Hole, Mass.) 1954-
- Ocean Park Carnation Nursery.
- Ocean Springs Pecan Nursery.
- Ocean View Nursery.
- Oceanographic Workshop Palisades, N.Y.) 1964-
- Oceanography and Limnology Program (Smithsonian Institution)
- Oceguera-Camacho, Delia Karen E
- Oceguera-Figueroa, Alejandro
- Och, D J
- Och, David
- Och, David J
- Ochandio, BS.
- Ocharan, Francisco J.
- Ochiai, Akira
- Ochiai, Keiji
- Ochiai, Norikuni.
- Ochmigke, Ludwig,
- Ochoa Díaz-López, Hector
- Ochoa Estrada, Salvador
- Ochoa Fuentes, YM
- Ochoa G., José
- Ochoa Izaguire, Ma. Julia
- Ochoa Villagómez, Ignacio.
- Ochoa, C
- Ochoa, C M
- Ochoa, Carlos M.,
- Ochoa, J
- Ochoa, Jorge
- Ochoa, José Antonio
- Ochoa, José Luis
- Ochoa, Luz Eneida
- Ochoa, Rolando Teruel
- Ochoa, Ronald
- Ochoa, Salvador
- Ochoa, Y
- Ochoa-Alvarez, Norma
- Ochoa-Báez, Rosa Isabel
- Ochoa-Díaz, María Ruth
- Ochoa-Estrada, S
- Ochoa-Fuentes, YM
- Ochoa-Gaona, Susana
- Ochoa-Muñoz, María J
- Ochoa-Ochoa, Leticia M.
- Ochoa-Orrego, Luz Eneida
- Ochoa-Quintero, Jose Manuel
- Ochoterena, Helga
- Ochoterena, Isaac, 1885-1950
- Ochs, Georg 1887-1971
- Ochs, Syntomis
- Ochsé, W
- Ochsenheimer, Ferdinand, 1767-1822
- Ochsenius, Carl
- Ochsner, Washington Henry, 1879-1927
- Ochumba, Peter B O
- Ochyra, Ryszard
- Ociepa, Anna Maria
- Ockenden, Nancy,
- Ockenfels, Richard A.
- Ocklawaha Nurseries.
- Ockruck, F
- Ocón, Carolina
- Ocon, Carolina S.
- Ocón, Carolina S.
- O'Connell Seafood Co., Inc.
- O'Connell, Allen F.
- O'connell, Daniel Joseph Kelly
- O'Connell, Geoffroy M.
- O'Connell, Lauren
- O'Connell, M.
- O'Connell, Marjorie, 1890-
- O'Connell, Paul F., 1934-
- O'connell, Timothy J
- O'Connor, Barry M
- O'connor, Candace S
- O'Connor, Cecilia M. 1927-
- O'Connor, D. J.
- O'Connor, F. W.
- O'Connor, Francis William.
- O'Connor, Hali
- O'Connor, J. M.
- O'Connor, James P.
- O'Connor, Jingmai
- O'connor, Joel S
- O'Connor, John Lawrence, 1875-
- O'Connor, K.
- O'connor, Kathleen
- O'connor, Kathleen D
- O'Connor, Neil
- O'Connor, P. A.
- O'Connor, Patrick M
- O'Connor, Patrick, fl 1857-
- O'connor, Raymond J.
- O'connor, Sue
- O'connor, T G
- O'Connor, Thomas P.
- O'Connor, Thomas P., 1944-
- O'Connor, Trudy
- O'connor, W A
- O'connor, W G
- O'Connor-Sánchez, A
- Octave Doin.
- Ocupa Horna, Luis
- Oda, Fabrício H
- Oda, Fabrício Hiroiuki
- Oda, FH
- Oda, FH.
- Oda, Motoyoshi
- Oda, R A M
- Oda, Rubens A M
- Oda, Shuzitu
- Oda, Welton Yudi
- Odagiri, Hideho
- Odak, S C
- Odanga, I J
- Odanga, J
- Odanga, James J
- O'Daniel, Donna
- O'day, Danton H
- O'day, W T
- O'day, William T
- Odden, John
- Odden, Morten
- Oddi, E Arrigoni
- Oddi, E Arrigoni Ddegli
- Oddi, E Arrigoni Degli
- Oddie, Neville
- Oddo, Robert
- Oddone, M. Cristina
- Oddone, María C
- Oddone, María C.
- Oddone, Maria Cristina
- Oddone, María Cristina
- Odé, Baudewijn
- Ode, P
- O'Dea, Anne
- O'Dea, Mark G
- O'Dea, Niall R.
- Odebrecht, C.
- Odebrecht, Clarisse
- Odede, Walter
- Odegard, Craig
- Odell, R. T. 1915-