- Cochran, Jerome, 1831-18962
- Cohen, J. Solis (Jacob Solis), 1838-19272
- Collyer, Robert H. (Robert Hanham)2
- Columbia University. Division of War Research. Summary Reports Group, author.2
- Comfort, J. W. (John W.)2
- Comings, B. N. (Benjamin Newton), 1816-18992
- Confederate States of America. Army, author.2
- Conn, H. W. (Herbert William), 1859-1917 author2
- Coombs, F. (Frederick)2
- Corbella, Tito, 1885-1966, artist2
- Corvisart des Marets, Jean Nicolas, baron, 1755-18212
- Cox, Christopher C. (Christopher Christian), 1816-18822
- Croce, Giovanni Andrea della, 1514-1575, Author2
- Croserio, C. (Camille), 1786-18552
- Crothers, T. D. (Thomas Davison), 1842-1918, author2
- Culpeper, Nicholas, 1616-16542
- Currie, James, 1756-18052
- Cutter, Ephraim, 1832-1917 author2
- Cutter, John C. (John Clarence), 1851-, author2
- Da Costa, J. M. (Jacob Mendes), 1833-1900 author2