Names
- Colorado and Southern Railway.1
- Columbus, Chicago and Indiana Central Railway Company.1
- Commons, John Rogers, 1862-1945.1
- Conant, Charles A. (Charles Arthur), 1861-1915.1
- Cooley, Charles Horton, 1864-1929.1
- Cooley, Lyman Edgar, 1850-1917.1
- Cooley, Mortimer E. (Mortimer Elwyn), 1855-1944.1
- Cooley, Thomas McIntyre, 1824-1898.1
- Cornell University1
- Crawford and Manistee River Railway Company.1
- Cummer Lumber Company.1
- Cummer Sons Cypress Company.1
- Cummer-Diggins Company.1
- Cutler & Savidge Lumber Company.1
- D'Ooge, Martin Luther, 1839-1915.1
- D.N. McLeod Lumber Company.1
- Dawson, William Mercer Owens, 1853-1916.1
- Day, D. H. (David Henry), 1854-1
- Denver and Rio Grande Railroad Company.1
- Detroit & River St. Clair Railway Company.1