- Cottens, Kelly
- Cotter, James Laurence
- Cotter, Jorge Candido Berkeley, 1844-
- Cotter, K L
- Cotter, Paul A.
- Cotter, Phil
- Cotter, R C
- Cotter, Richard C. 1961-
- Cottereau, M E
- Cotterell, Edward, 1857-1898
- Cotterell, G S
- Cotterill, Rodney, 1933-
- Cotterman, Laura M
- Cotteswold Naturalists' Field Club.
- Cottet, Michel, 1825-1896
- Cottier-Cook, Elizabeth Joanne
- Cottingham, Susan.
- Cottle, Judith
- Cottle, Richard
- Cotton, A. D. (Arthur Disbrowe), 1879-
- Cotton, Bernard C.
- Cotton, Charles F.
- Cotton, Charles, 1630-1687
- Cotton, E. M., Mrs.
- Cotton, Edward Howe, 1881-1942
- Cotton, Fassett A. (Fassett Allen), 1862-1941
- Cotton, Frederick.
- Cotton, Hugh C
- Cotton, J. S.
- Cotton, John, 1801-1849
- Cotton, John, F.Z.S.
- Cotton, L A
- Cotton, Leo Arthur
- Cotton, Lizzie E.
- Cotton, M. M.
- Cotton, R. T.
- Cotton, Richard Payne
- Cotton, T
- Cotton, T. A.
- Cotton, W.
- Cotton, William Bensley, 1872-
- Cotton, William Charles, 1813-1879
- Cotton, William Edwin,
- Cottonwood Consultants Ltd.
- Cottonwood Garden Shop (Littleton, Colorado)
- Cottreau, J
- Cottrell, G A
- Cottrell, G. William, Jr.
- Cottrell, H. M.
- Cottrell, Horace S.
- Cottrell, Ted
- Cottrell, Thomas R
- Cottridge, David
- Cottrill, D Andrew
- Coturel, Eliana Paula
- Couailhac, L. (Louis), 1810-1885
- Couble, A
- Couceiro, Paulo Rogério Da Costa
- Couceiro, Sheyla Regina Marques
- Couch Bros. Nursery Co.
- Couch Brothers Nursery Co. (McMinnville, Tenn.)
- Couch, C A
- Couch, Darius Nash.
- Couch, Ernest F.
- Couch, James F. (James Fitton), 1888-
- Couch, John Nathaniel, 1896-1986
- Couch, Jonathan, 1789-1870
- Couch, Richard Quiller, 1816-1863
- Couch, T. K.
- Couch, William P.
- Couchman, J. Kenneth, 1941-
- Couchman, L. E.
- Couchman, Stephen, active 1779-1824
- Couchoud, Yves,
- Couckuyt, Jurgen
- Couderc, H
- Couderc, Marie
- Couderc-Levaillant, Michèle
- Coudret, A
- Coues, Elliott, 1842-1899
- Couet, Heinz-Gert de
- Couey, H. Melvin, 1926-
- Coufal, Radovan
- Couffer, Michael C
- Coughenour, Michael B
- Coughlan, Neil E.
- Coughlin Gardens.
- Coughlin, D J
- Coughlin, Elizabeth A
- Coughran, D K
- Coughran, Jason
- Coughtrey, Millen
- Cougny, A
- Coulcher, Blane
- Coulembier,
- Coulis, Mathieu
- Coull, Bruce C.
- Coulleri, Juan Pablo
- Coulloudon, Bill.
- Coulmiers, François Simonnet de, sieur d'Escolmiers, 1741-1818
- Coulon, Georges
- Coulon, Louis
- Coulson, Alan
- Coulson, Arthur L
- Coulson, F. R. (Frederick Raymond), 1864-1922
- Coulson, G. M. (Graeme M.)
- Coulson, J C
- Coulson, Jack R., 1931-
- Coulson, Jennifer O
- Coulson, John, d.1926.
- Coulson, Robert N. (Robert Norris), 1943-
- Coulson, Roland A.
- Coulson, Tom (Thomas D.)
- Coulson, William, 1802-1877
- Coultas, Harland, 1817-1877
- Coultas, William Ferrell, 1899-1965
- Coulter, Cyndi.
- Coulter, John G. (John Gaylord), 1876-
- Coulter, John Merle, 1851-1928
- Coulter, Malcolm Clarke, 1947-
- Coulter, Merle C. (Merle Crowe), 1894-1958
- Coulter, Stanley, 1855-1943
- Coulter, Thomas, 1793-1843
- Coulter, W. K.
- Coulthard, Emma
- Coumar, A
- Council Bluffs Seed Company.
- Council for International Organizations of Medical Sciences.
- Council for Scientific and Industrial Research (Australia)
- Council for the Preservation of Rural England. Cheshire Branch.
- Council of Public Instruction of France
- Council of The Royal Society of Queensland
- Council of the Southwest Science Association.
- Council on Environmental Quality (U.S.). Committee on Ecological Research.
- Council on Environmental Quality (U.S.). Federal Working Group on Pest Management. Monitoring Panel.
- Council, Trevor.
- Councilman Camellia Acres,
- Counsilman, J J
- Count d'Eprémesnil, 1827-1891
- Country clergyman, active approximately 1860-
- Country Curate.
- Country Greenhouse,
- Country Life Limited.
- Countryman, Clive M.,
- Countryman, Kenneth A.
- Countryman, William D.
- Counts, Clement Lee
- County of Brome Agricultural Society (Quebec).
- Counu, M Mexime
- Couoh-Concha, Andrea Del Jesus
- Coupar, Pat
- Coupé, Jacques-Michel, 1737-1809
- Coupe, Malcolm Douglas.
- Couper, J
- Couper, James
- Couper, Julia M.
- Couper, Justin
- Couper, Patrick
- Couper, William, 1886
- Coupin, F. (Fernande), 1892-1930
- Coupin, Fernande
- Coupin, Henri Eugène Victor, 1868-
- Coupin, Henri, 1868-1937
- Coupland, G T
- Coupland, Sidney, 1849-1930
- Coupvent-Desbois, Aimé-Auguste Elie, 1814-1892
- Cour, Pierre
- Coura, José R.
- Coura, R.
- Courant, A V
- Courbé, Augustin.
- Courbon, M A
- Courchamp, Franck
- Courchet
- Courchet, L
- Courchet, M L
- Courel, H.
- Couret, Thierry
- Couri, Claydon C
- Couri, M S
- Couri, Marcia Souto
- Courier, Paul-Louis, 1772-1825
- Courrier, Robert
- Course, J E J
- Courser, E. J.
- Coursey, Yvonne
- Court Of Iris,
- Court van der Voort, Pieter de la, 1664-1739
- Court, A B
- Court, Arthur
- Court, Benoît de.
- Court, G. S.
- Court, Gordon
- Court, Helen K.
- Court, J.
- Court, Nicholas
- Courtalon, Paula
- Courtauld, Sydney
- Courte, Victoria L. Pittman
- Courteaux, René
- Courtecuisse, R
- Courtecuisse, Régis
- Courteen Seed Company.
- Courtenay, Edward.
- Courtenay, Simon C.
- Courtenay, Walter R.
- Courtenay-Latimer, M
- Courtens, Wouter
- Courter, J. W.
- Courtet
- Courtial, Béatrice
- Courtial, Cyril
- Courtice, G P
- Courtin, Albert, 1871
- Courtin, André
- Courtin, Claudine
- Courtin, Louis, active 1809-1841
- Courtin, Olivier
- Courtis, William M.
- Courtis, William Munroe,
- Courtney Mustaphi, Colin J.
- Courtney, A J
- Courtney, Charles H
- Courtney, Cheryl C. (Cheryl Christine)
- Courtney, Gregory W.
- Courtney, Lee A.
- Courtney, Patrick
- Courtney, R. F.
- Courtney, Steven P.
- Courtney, Wilbur D
- Courtney, Wilshire S.
- Courtney,Peter A.
- Courtney-Haines, L. M.
- Courtois, Elodie Alice
- Courtois, F
- Courtois, Le P
- Courtois, Réhaume
- Courtois, Richard Joseph, 1806-1835
- Courtright, Gordon,
- Courtwright, Jennifer.
- Courty, G
- Courvoisier, L. G. (Ludwig Georg), 1843-1918
- Courvoisier, Prof Dr
- Cousen, John, 1804-1880
- Cousens, Henry
- Cousens, John A.
- Cousens, Michael I
- Cousens, Penny
- Cousens, R D
- Couser, Rhys