Authors: Ro
- Cocking, Ron -
- Coe, Wesley R. (Wesley Roswell) 1869-1960
- Cohen, Octavus Roy 1891-1959
- Coignet, Jean-Roch 1776-1860
- Coker, R. E. (Robert Ervin) 1876-1967
- Colcord, Lincoln 1883-1947
- Coleman-Norton, Paul R. (Paul Robinson) 1898-1971
- Coleridge, Christabel R. (Christabel Rose) 1843-1921
- Cole, Rossetter G. (Rossetter Gleason) 1866-1952
- Collingwood, R. G. (Robin George) 1889-1943
- Coloma, Luis 1851-1915
- Colonna de Cesari-Rocca, Pierre Paul Raoul, comte 1864-1922
- Coltman, Robert 1862-1931
- Commons, John R. (John Rogers) 1862-1945
- Conant, Roger William 1895-
- Conover, Mary Roberts 1880-
- Conrad, Robert Taylor 1810-1858
- Contor, Roger J. 1930-
- Conway, G. R. G. (George Robert Graham) 1873-1951
- Coolidge, Mary Roberts 1860-1945
- Cooper, Francis L. (Francis Le Roy) -
- Cooper, Grace Rogers 1924-2004
- Cooper, Robert 1819-1868
- Cooper, Robert A. -
- Coote, Rosa Belinda -
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