Names
- Claxton, Philander Priestley, 1862-1957.1
- Clements, William L. (William Lawrence), 1861-1934.1
- Cleveland, Cincinnati, Chicago, and St. Louis Railway Company.1
- Colorado and Southern Railway.1
- Commons, John Rogers, 1862-1945.1
- Conant, Charles A. (Charles Arthur), 1861-1915.1
- Conant, James Bryant, 1893- .1
- Conant, James Bryant, 1893-1978.1
- Connick, Charles Jay, 1875-1945.1
- Cooley, Lyman Edgar, 1850-1917.1
- Cooley, Mortimer E. (Mortimer Elwyn), 1855-1944.1
- Cooley, Thomas McIntyre, 1824-1898.1
- Copeland, Royal S. (Royal Samuel), 1868-1938.1
- Cornell University1
- Corwin, E. H. L. (Edward Henry Lewinski), 1885-1953.1
- Corwin, E.H. Lewinski.1
- Cowley, Malcolm, 1898- .1
- Cowley, Malcolm, 1898-1989.1
- Cram, Ralph Adams, 1863-1942.1
- Cret, Paul Philippe, 1876-1945.1