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- Cognato, Anthony I
- Cognato, Diego de Paula
- Cogneau, Sari
- Cognetti de Martiis, Luigi, 1930
- Cognetti De Martiis, Selvaggia
- Cogniaux, Alfred, 1841-1916
- Cogo, Gláucia Bolzan
- Cogollo, A
- Cogolludo, José
- Cogoni, Annalena
- Cogoni, Donatella
- Cogoni, Roberto
- Cogswell, Edward Everett, 1864-
- Cogswell, H. C., Mrs.
- Cogswell, Howard L.
- Cogua, Pilar
- Coguill, Scott L
- Cohausen, Johann Heinrich, 1665-1750
- Cohausen, Salentin Ernst Eugen, 1703-1779
- Cohen Nabeiro, Anna
- Cohen, A. F.
- Cohen, Aaron
- Cohen, Abigail
- Cohen, Adolph I
- Cohen, Anne C.
- Cohen, B E
- Cohen, Barbara
- Cohen, Barry M
- Cohen, Bernard L
- Cohen, Bruce I.
- Cohen, C
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- Cohen, Daniel M.
- Cohen, Emil
- Cohen, Ernst Julius, 1869- Ha
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- Cohen, Graciela R.
- Cohen, Herman
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- Cohen, Jonathan H
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- Cohen, Kelly de Oliveira
- Cohen, Lawrence B.
- Cohen, Linda
- Cohen, Lionel
- Cohen, Marcelo Cancela Lisboa
- Cohen, Marion F
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- Cohen, Nancy E
- Cohen, Oded
- Cohen, P. (Philip) 1945-
- Cohen, Pascale A.
- Cohen, S B
- Cohen, S D
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- Cohen-Shlagman, L
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- Cohn, Alfred I. (Alfred Isaac), 1860-
- Cohn, Edwin J
- Cohn, Ferdinand, 1828-1898
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- Cohn, Jeffrey
- Cohn, Marc
- Cohn, Theodore J
- Cohn-Haft, Mario
- Cohuo Duran, Sergio
- Coiffait, Henri, 1907-1989
- Coignard, Jean Baptiste, III 1693-1768
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- Coile, Nancy C. (Nancy Craft), 1940-
- Coimbra Junior, Carlos Everaldo Alvares, 1959-
- Coimbra, Ana Maria
- Coimbra, Jefferson Luiz Meirelles
- Coimbra, Joao Carlos
- Coimbra, MAA.
- Coimbra, Marco Antônio Afonso
- Coimbra, Victor R. M
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- Coineau, Yves
- Coiro, José Rafael Rosito
- Coirolo, Alícia Durán
- Coit, J. Eliot, 1880-
- Coit, Marjorie C.
- Coiutsis, John G
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- Cokely, J. T.
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- Coker, Darren J.
- Coker, David Robert, 1870-1938
- Coker, Ernest George,
- Coker, George A.
- Coker, K J
- Coker, R. E. (Robert Ervin), 1876-1967
- Coker, Robert Richardson, 1905-1987
- Coker, S. Pressly.
- Coker, William Chambers, 1872-1953
- Coker's Pedigreed Seed Company (Hartsville, S.C.)
- Col, M A
- Cola, Luciana
- Colacello, F
- Colacino, Carmine
- Colacino, James M
- Colaço, Miguel A.S.
- Colado, Raquel
- Colagrossi, P.
- Colaiúti, Darío
- Colak, Ercument
- Cola-Miranda, Maira
- Colamonaco, G
- Colangelo, Paolo
- Colani, Madeleine, 1866-1943
- Colaninno, Carol E.
- Colantonio, Sonia E.
- Colard, Claude
- Colares, Elton P.
- Colares, Ioni Gonçalves
- Colares, Marta N.
- Colas, G
- Colasante, Maretta
- Colas-Belcour, J
- Colas-Rosas, Paul F.
- Colas-Rosas, Paul François
- Colatriano, P
- Colautti, Dario César
- Colautti, Robert
- Colavite, Jessica
- Colazza, Stefano
- Colbath, G K
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- Colbert, Edwin Harris
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- Colbert, Roy J.
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- Colbrunn, Eduard.
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- Colburn, E. A., 1842-1935
- Colburn, Henry, 1855
- Colburn, Henry, 1784-1855
- Colburn, J. G.
- Colburn, Paul W.
- Colburn, William W.
- Colby Nurseries.
- Colby, A C C
- Colby, Arthur Samuel.
- Colby, Clyde.
- Colby, Forrest H.
- Colby, George.
- Colby, Isaac.
- Colby, Lucius H.
- Colby, Marilyn K.
- Colby, Thomas, 1784-1852
- Colcanap
- Colchester, D M
- Colchester, David M
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- Colcord, Mabel.
- Colcord, Samuel Marshall, 1817-1895
- Colden, Cadwallader 1688-1776
- Coldiron, Ronn W.
- Colditz, Margaret J
- Coldren, C
- Coldren, M
- Coldstream, John
- Coldwell, Cyril
- Coldwell, J D
- Cole Nina
- Cole Nursery Company,
- Cole Nursery Company.
- Cole Seed Co.
- Cole, A. N. (Asahel N.), 1821-1889
- Cole, Anthony
- Cole, Arthur C.
- Cole, Arthur C., Jr., (Arthur Charles), 1908-1995
- Cole, B. (Benjamin),
- Cole, Blaine J
- Cole, C F
- Cole, Carolyn.
- Cole, Charles J.
- Cole, Chas. A.
- Cole, Dan
- Cole, David N.
- Cole, Dennis M.
- Cole, Douglas, 1938-1997
- Cole, E R
- Cole, Edward B.,
- Cole, Emelene M., Mrs.,
- Cole, Emma Jane, 1845-1910
- Cole, Emma L. Taylor.
- Cole, F. J. (Francis Joseph), 1872-1959
- Cole, Fay-Cooper, 1881-
- Cole, Forrest.
- Cole, Francis K.
- Cole, Frank J
- Cole, Frank R. (Frank Raymond)
- Cole, G A
- Cole, G. D. H. 1889-1959
- Cole, Gerald A. (Gerald Ainsworth) 1917-
- Cole, Glen F.
- Cole, Glenn
- Cole, H A
- Cole, Heather
- Cole, J H
- Cole, J. R.
- Cole, J.W. & Son.
- Cole, James
- Cole, Jane B
- Cole, Jeffrey A.
- Cole, Joan L
- Cole, John
- Cole, John S. (John Selden), 1878-
- Cole, Jonathan
- Cole, K D
- Cole, K. S.
- Cole, Kenneth