- Classical Association (Great Britain)
- Clastrier, Jean
- Clater, Francis, 1756-1823
- Clater, John
- Claude A. Barr (Firm)
- Claude, Caesar, 1939-
- Claude, Jocelyn
- Claudiano, Gustavo da Silva
- Claudi-Magnussen, Glenn
- Claudino, M.
- Claudino, Marlucy Coelho
- Claudino, Ricardo M.
- Cláudio, Vinícius C. (Vinícius Cardoso)
- Claudio-Paragas, Celine Yssabell
- Claudius, Matthias.
- Claunch, Natalie M.
- Claus, Carl, 1835-1899
- Claus, Katja
- Claus, Simon
- Clausager, K. E.
- Clause, Adam G
- Clausen, A M
- Clausen, Aaron
- Clausen, B
- Clausen, Curtis P. (Curtis Paul), 1893-
- Clausen, J. A.
- Clausen, James A.,
- Clausen, Jens (Jens Christian), 1891-1969
- Clausen, Jens Christian, 1891-
- Clausen, Kristin S.
- Clausen, P J
- Clausen, Robert T. (Robert Theodore), 1911-1981
- Clausen, Roy Elwood, 1891-
- Clausner, Edward.
- Clausner, James E.
- Clausnitzer, Viola
- Clauson, John M.
- Clauson, M Th
- Clausse, Georges Nicolas.
- Claussen, Cathryn L.
- Claussen, Claus
- Claussen, Claus-Peter
- Claussen, J
- Claussen, Jeff
- Claussen, Pierre.
- Claustre, Hervé
- Clauzel, Jean-Baptiste, 1745-1804
- Clauzet, Gabriel
- Clauzet, J P
- Clauzet, Mariana
- Clavareau, H
- Clavareau, P., active 1750-
- Clavaud, Armand, 1828-1890
- Clavé, Jules, 1826-
- Claveau, R.
- Claver, Silvia
- Clavero, Miguel
- Clavero-Camacho, Ilenia
- Clavero-Sousa, Helena
- Clavier, Jacques
- Clavigero, Francesco Saverio, 1731-1787
- Clavijo Albertos, José Alejandro 1953-
- Clavijo, Alejandro
- Clavijo, Cristhian
- Clavijo, Laura
- Clavijo, P.A. Rodriguez
- Clavijo-Baquet, Sabrina
- Clavijo-Bustos, Julián
- Clavio, Cristhian
- Clawson, A. B.
- Clawson, B. J.
- Clawson, David L.
- Claxton, Sandra K.
- Claxton, T F
- Clay, B T
- Clay, C. J.,
- Clay, Douglas
- Clay, Gareth
- Clay, Harold J. (Harold Johnson), 1892-
- Clay, Heather
- Clay, John R
- Clay, John,
- Clay, John, 1851-
- Clay, Marcia B
- Clay, R. P.
- Clay, Richard, 1789-1877
- Clay, Robert
- Clay, Robert P
- Clay, Theresa
- Clay, William M.
- Clayberg, H D
- Clayborn, Jaeson
- Claybrooke, G.
- Claybrooke, J De
- Clayburn, Jere K.
- Clayden, S
- Clayden, Stephen R.
- Claydon, Alan
- Clayfield, Kimberley
- Clayforth, E. W.
- Claypole, Agnes M
- Claypole, E. W. (Edward Waller), 1835-1901
- Claypole, Edith J
- Clayton
- Clayton, Colin H.
- Clayton, Dale H.
- Clayton, Dale L
- Clayton, Derek
- Clayton, Edward E.
- Clayton, Eric
- Clayton, Geoffrey
- Clayton, J. W.
- Clayton, James L. (James Lindow), 1942-
- Clayton, Jason R
- Clayton, John
- Clayton, John, 1686-1773
- Clayton, John, 1694-1773
- Clayton, L. Yvonne, 1918-
- Clayton, Lena
- Clayton, Margaret N
- Clayton, Michael Wilson
- Clayton, Richard, Sir, 1828
- Clayton, Shuttleworth, and Company.
- Clayton, Susan
- Clayton, W D
- Clayton, W. W. (W. Woodford)
- Clayton, Walter J.
- Clayton, William S
- Cleal, Christopher J., 1951-
- Cleal, David
- Clean Air Strategic Alliance.
- Clean Air Strategy for Alberta.
- Clear Creek Ranger District (Colo.)
- Clear Water Nurseries.
- Clear, Rhian
- Cleare, L D
- Clearfield Bituminous Coal Corporation.
- Clearview Gardens.
- Clearwater, Susan
- Cleary & Co.
- Cleary, C. W.
- Cleary, Michelle
- Cleator, Holly J.
- Cleaveland, Parker, 1780-1858
- Cleaves, Florena.,
- Cleaves, Howard H
- Cleavitt, Natalie L.
- Clebsch, Alfred, 1833-1872
- Clebsch, Hans
- Clebson Ribeiro Mendes, Jone
- Cledon, M
- Cledón, Maximiliano
- Clee, Carl
- Clee, T.H.
- Cleef
- Cleef, Antoine M
- Cleef, Gebroeders van ('s-Gravenhage ; Amsterdam)
- Cleeland, M.
- Cleemput, Oswald van
- Cleere, Nigel
- Cleeton, R J.
- Cleevely, R J
- Cleevely, Ronald James
- Cleeves, Rohan
- Clegg, James S
- Clegg, Moses Tran, 1876-
- Clegg, Samuel, 1814-1856
- Clegg, Tamsin
- Cleghorn, Allen
- Cleghorn, H. (Hugh Francis Clarke), 1820-1895
- Cleghorn, J. D.
- Cleghorn, Miss Maude L
- Cleghorne, W. S. H.
- Cleland, Charles F
- Cleland, E R
- Cleland, G G
- Cleland, Herdman Fitzgerald, 1869-1935
- Cleland, J. G.
- Cleland, John Burton 1878-1971
- Cleland, John, 1835-1925
- Cleland, K W
- Cleland, M A
- Cleland, Ralph E
- Clelland, E S
- Clem, Carl Scott
- Clem, M A
- Clemann, Nick
- Clemants, Steven Earl
- Clemen, G
- Clemen, Günter
- Clemenceau, Georges, 1841-1929
- Clémençon, H
- Clemens, Brackenridge, 1826-1867
- Clemens, Howard P. 1923-2007
- Clemens, James W.
- Clemens, Johan Frederik, 1748-1831
- Clemens, Joseph, 1862-1936
- Clemens, Justin
- Clemens, Mary Strong, 1873-1968
- Clemens, Samuel Langhorne, 1835-1910
- Clemens, Sandra
- Clemens, W. A. (Wilbert Amie), 1887-1964
- Clemens, William A. Jr. (William Alvin)
- Clemens, William Joseph
- Clement I, Pope,
- Clement, A.-M.
- Clément, A-L
- Clement, Alejandro
- Clement, Alice M
- Clement, Arthur G.
- Clément, Camille.
- Clement, Charles R
- Clement, Charles R.
- Clement, Christopher J. E.
- Clement, Clarence E. (Clarence Elbert), 1883-
- Clement, Clarence Elbert, 1883-
- Clement, Daniel
- Clement, Duncan
- Clement, Ernest W. (Ernest Wilson), 1860-1941
- Clement, F. M. (Frederick Moore), 1884-
- Clément, Francis
- Clement, G M
- Clement, G. E. 1877-
- Clement, G. Latta.
- Clement, George Edwards, 1877-
- Clement, George Edwards.
- Clement, Ian D
- Clement, Michel
- Clement, Patrick.
- Clement, Peter, 1948-
- Clément, Pierre
- Clement, R A
- Clement, R. E.
- Clement, Ray
- Clement, Roland C
- Clément, Romain
- Clement, S L
- Clement, S W J
- Clement, W R T
- Clement, Wendy L.
- Clemente Muñoz, Margarita A.
- Clemente y Rubio, Simón de Rojas
- Clemente, Christofer J.
- Clemente, Iara
- Clemente, Iara Martins Moreira Matos
- Clemente, Maria Eulalia
- Clemente, Natalia L
- Clemente-Carvalho, Rute Beatriz Garcia
- Clemente-Sánchez, Fernando
- Clementi, Giuseppe, 1812-1873