- Cooke, Nicholas Francis, 1829-18853
- Cope, E. D. (Edward Drinker), 1840-18973
- Coplin, W. M. Late (William Michael Late), 1864-1928 author3
- Cordero y Gomez, Miguel, 1850-1893, author3
- Cordier, A. H. (Albert H.), 1859- author3
- Corson, John W.3
- Cotton, Frederic J. (Frederic Jay), 1869-19383
- Cowl, Walter Y., author3
- Cowles, Edward, 1837-1919, author3
- Cowling, Richard Oswald, 1839-1881, author3
- Crile, George Washington, 1864-19433
- Culverwell, Robert James, 1802-18523
- Currier, Andrew F. (Andrew Fay), 1851-19373
- Curtis, Edward, 1838-1912, author3
- Curwen, John, 1821-1901, author3
- Cushing, Clinton, 1840-3
- Cushing, Ernest W. (Ernest Watson), 1847-1916, author3
- Cutler, Condict W. (Condict Walker), 1859-19303
- Cutter, Calvin, 1807-1873?3
- Da Costa, J. M. (Jacob Mendes), 1833-1900, author3