- Ogan, Sophie
- Oganesian, Marine
- Oganesyan, Stella
- O'gara, B W
- O'Gara, Emer
- O'gara, P J
- O'Gara, P. J. (Patrick Joseph), 1872-1927
- O'Gara, Patrick Joseph.
- Ogasawara, F X
- Ogasawara, Kenshiro
- Ogasawara, M
- Ogasawara, Masako
- Ogasawara, Tsuyoshi
- Ogasawara, Yoshimitsu
- Ogashawara, I
- Ogata Aguilar, Nisao
- Ogata, Kazuo
- Ogata, Kenzan, 1663-1743
- Ogata, Kikuo
- Ogata, Kōrin, 1658-1716
- Ogata, Roberto Shojirou
- Ogata, Seiji
- Ogawa, Akito
- Ogawa, Frank H.
- Ogawa, J M
- Ogawa, K.
- Ogawa, Kazuo
- Ogawa, Kyoichi
- Ogawa, Minori.
- Ogawa, Mizuho
- Ogawa, Ryo
- Ogawa, Y
- Ogawa, Yujiro
- Ogbogu, Sylvester Sunday
- Ogborn, James E A
- Ogburn, John H
- Ogden Nurseries.
- Ogden, C. K. (Charles Kay), 1889-1957
- Ogden, Colin G
- Ogden, Colin Gerald
- Ogden, E C
- Ogden, E. Lucy (Elise Lucy)
- Ogden, Eugene Cecil.
- Ogden, Glen E
- Ogden, Gouverneur M.
- Ogden, Henry Neely, 1868-
- Ogden, James.
- Ogden, Jeffrey
- Ogden, John C
- Ogden, Lesley Evans
- Ogden, Mary Ann Hollingsworth, 1943-
- Ogden, R W
- Ogden, T. Heath (Thomas Heath), 1973-
- Ogen, Raimon
- Ogen-Odoi, Asaph A.
- Oger, Pierre
- Ogérien, frère.
- Ogg, A
- Oggema, M. W.
- Oggero, Antonia J
- Oggero, Antonia J.
- Oggero, Antonia Josefina
- Oggiano, G
- Oggier, Alan
- Oggioni, Alessandro
- Ogielska, Maria
- Ogilby, John Douglas 1853-1925
- Ogilby, John, 1600-1676
- Ogilby, William 1805-1873
- Ogilvie, Fergus Menteith, 1861-1918
- Ogilvie, George, 1820-1886
- Ogilvie, Ian S.
- Ogilvie, James.
- Ogilvie, P
- Ogilvie‐ghant, W R
- Ogilvie‐giunt, W R
- Ogilvie‐grant, W R
- Ogilvie-Grant, W. R. (William Robert), 1863-1924
- Ogilvie‐grant., W E
- Ogilvie‐grant., W R
- Ogilvy, Arthur James
- Ogilvy, Christopher S
- Ogilvy, Victoria
- Ogimi, C
- Ogino, Kimihiro
- Oginuma, Kazuo
- Ogiso, Manabu
- Ogisu, Mikinori
- Ogle, Clayton E.
- Ogle, Colin
- Ogle, D
- Ogle, F
- Ogle, H J
- Ogle, J. M.
- Ogle, John
- Ogle, John T
- Ogle, John W.
- Ogle, William, 1827-1912
- Ogleby, C
- Oglesby, L C
- Oglesby, Larry C
- Oglesby, Larry C.
- Ogloblin, A A
- Ogloblin, Alejandro
- Ogneff, S I
- Ogneff, S J
- Ognev, S J
- Ognev, S. I. (Sergei Ivanovich), 1886-1951
- Ognjanova, Nadja
- Ogo, S. H.
- Ogola, M F
- Ogoma, Maurice
- Ogoma, Maurice O
- Ogorelec, Žiga
- O'gower, A K
- O'Gower, A. K.
- O'Grady, Anthony P.
- O'grady, Daniel F
- O'Grady, John Patrick, 1945-
- O'Grady, Magnus
- O'Grady, Patrick
- Ogren, Herman A.
- Ogren, Larry H.
- Ogren, Robert E.
- Ogris, Nikica
- Ogród farmakognostyczny w Poznaniu.
- Oguchi, A
- Oguchi, Atsuko
- Oguis, Georgianna Kae R
- Oguma, Kan
- Ogunbiyi, Ayokunle
- Ogura Fujii, Tetsuya
- Ogura, Lucy Lina
- Oguri, Emiko
- Oguri, Hiroki
- Oguri, Mikio
- Oguro, C
- Oguro, Chitaru
- Ogusku, Mauricio Morishi
- Ogusuku, Elena
- Ogusuku, Leonardo Massamitsu
- Ogut, Hamdi
- Oguz, Temel
- Oh, Ami
- Oh, Byoung-Un
- Oh, Jae-In
- Oh, Jeong Su
- Oh, Michael
- Oh, Min Suk
- Oh, S C
- Oh, Sang-Hun
- Oh, Seung Hwan
- Oh, Seung-Yoon
- Oh, Sung-Yong
- Oh, Yaechan
- O'Hagan, William.
- O'Hair, E. L.
- O'Hair, H. Z.
- O'Hair, Z. P.
- O'halloran, Kathleen A
- O'Halloran, Kathleen Ann, 1957-
- Ohana, Débora Teixeira
- Ohana, Tamiko
- O'Handley, Ryan M.
- Ohanjaman, Isabel
- O'Hanlon, Aidan
- O'Hanlon, Jeremiah.
- O'Hanlon, Richard
- O'hara, G W
- O'hara, Graham
- O'Hara, J. E.
- O'Hara, James 1952-
- Ohara, Masaaki
- Ohara, Masahiro
- O'Hara, Niamh B
- O'hara, Robert J
- O'Hara, Tim
- O'Hara, Tim
- O'Hara, Timothy D.
- Ohara, William M.
- Ohara, Willian M.
- Ohara, Willian Massaharu
- Ohara, Yasuhiko
- O'Harra, Cleophas C. 1866-1935
- O'Harra, Edwin V.,
- Ohashi, Hiroyoshi
- Ohashi, Kazuyo
- Ohashi, Kiyono
- Ohashi, Orlando S.
- Ohashi, Orlando Shigueo
- Ohashi, Otavio Mitio
- Ohashi, Otávio Mitio
- Ohashi, Selma Toyoko
- O'haughnessy, A W E
- Ohaus, Friedrich, 1864-1946
- O'Hayer, Karen W.
- Ohba, Hideaki 1943-
- Ohba, Nobuyoshi
- Ohbayashi, K
- Ohbayashi, Kazuo
- Ohbayashi, Nobuo
- Ohdachi, Satoshi
- Ohe, Fumio
- Oheimb, Goddert von, 1970-
- Ohene-Mensah, Godfried
- Ohern, Daniel Webster, 1870-
- Ohguri, Miwako
- Ohio Academy of Science.
- Ohio Agricultural Experiment Station.
- Ohio Biological Survey.
- Ohio Coleopterists Society
- Ohio corn improvement association.
- Ohio Nursery and Seed Co.
- Ohio Nursery and Supply Company.
- Ohio red poll breeders' association.
- Ohio Rose Gardens.
- Ohio Seed Improvement Association.
- Ohio Shorthorn Breeders' Association
- Ohio Small Fruit Improvement Association, Inc.
- Ohio State Board of Agriculture.
- Ohio state forestry association.
- Ohio State Normal College.
- Ohio State University Scientific Society.
- Ohio State University.
- Ohio State University. Biological Club.
- Ohio State University. College of Agriculture and Home Economics.
- Ohio State University. Department of Botany.
- Ohio State University. Department of Home Economics.
- Ohio Valley Forest Nurseries.
- Ohio Valley Forest Nursery.
- Ohio Valley Improvement Association. Annual Meeting Wheeling, W. Va.) 1935-
- Ohio Valley Nut Trees.
- Ohio Valley Seed Co.
- Ohio Valley Seed Company.
- Ohio.
- Ohio. Bureau of feeds and fertilizers.
- Ohio. Bureau of insecticides and fungicides.
- Ohio. Department of Agriculture. Cooperative Crop Reporting Service.
- Ohio. Department of Home Economics.
- Ohio. Dept. of education.
- Ohio. Dept. of public instruction.
- Ohio. Division of Geological Survey.
- Ohio. General Assembly.
- Ohio. State board of agriculture.
- Ohio. State council of defense, 1917-1918.
- Ohi-Toma, Tetsuo
- Ohizumi, Yasushi
- Ohkawa, Muneyoshi
- Ohkubo, Tatsuhiro
- Ohkusu, Misako