- Cook, Wm. H. (William Henry), 1832-18994
- Cooke, Josiah P. Jr. (Josiah Parsons), 1827-18944
- Corning, J. Leonard (James Leonard), 1855-1923, author4
- Coues, Elliott, 1842-18994
- Coues, Elliott, 1842-1899 author4
- Coventry, C. B. (Charles Brodhead), 1801-18754
- Coxe, Edward Jenner, 1801-18824
- Crandall, Floyd M. (Floyd Milford), 1858-1919, author4
- Cushing, Clinton, 1840- author4
- Cushing, Harvey, 1869-19394
- Dalton, H. C. (Henry C.), 1847- , author4
- Daly, W. H. (William Hudson), 1842-1901, author4
- Darwin, Charles, 1809-1882 author4
- De Schweinitz, G. E. (George Edmund), 1858-1938 author4
- DeBeck, David, author4
- Denison, Charles, 1845-1909 author4
- Dennis, Frederic S. (Frederic Shepard), 1850-1934, author4
- Detroit (Mich.), author.4
- Dewey, Willis A. (Willis Alonzo), 1858-19384
- District of Columbia, enacting jurisdiction.4