| Cabasilas |
| Cacciapuoti |
| Cage |
| Cahiers de Royaumont Philosophie No IV |
| Caimi |
| Cairns |
| Callot |
| Calvino |
| Camerarius |
| Camman |
| Camoens |
| Camus |
| Candrakirti |
| Canetti |
| CANN |
| Cantacuzeni |
| Cantor |
| Cantore |
| Capek |
| Capra |
| Carnap |
| Carp |
| Carrol |
| Carter |
| Carvalho Jr. |
| Casanova |
| Casey |
| Cassirer |
| Castaneda |
| Catholique |
| Cavelius |
| CELAN |
| Céline |
| Cerisy |
| Cervantes |
| Chadwick |
| Chakrabarti |
| Chamberlain |
| Chambron |
| Chan |
| Chang |
| Chantal |
| Chapman |
| Charensol |
| Chari |
| Chatterjee |
| CHATTERJI |
| Chavannes |
| Chen |
| Chérel |
| Chevrillon |
| Childe |
| China |
| Ching |
| Chinmayananda |
| Chiodi |
| Chisholm |
| Chloros |
| Chomsky |
| Choniata |
| Christ |
| Christensen |
| CHRISTOUT |
| Chrysostom |
| CHRYSOSTOMUS |
| Chung-yuan |
| CHURCH |
| CICERO |
| Citsukha |
| Citsukhamuni |
| Claesges |
| Claudel |
| Climacus |
| Coburn |
| Cogniac |
| Cohen |
| Collinson |
| Comenius |
| Commers |
| Comte |
| Confessor |
| CONFUCIUS |
| Conrad |
| CONSTANT |
| CONSTEN |
| Conze |
| Cook |
| Cooke |
| Coomaraswamy |
| Cooper |
| Cortazar |
| Corvez |
| Couloubaritsis |
| Coulson |
| Courtine |
| Courtois |
| Couturat |
| Couvreur S. J. |
| COWARD |
| Cowell and others |
| Cowley |
| Cramer |
| Cremer |
| CRESSON |
| Cresswell |
| CRISPI |
| Croce |
| Croix |
| Crone |
| Cross |
| Crowell |
| Crowell Collier and MacMillan |
| Cruz |
| Culler |
| Curry |
| Cusa |