| Cacciari, Massimo (2) |
| Camón Aznar, José (3) |
| Campanella, Tomás (6) |
| Camps Cervera, Victoria (5) |
| Camus, Albert@ (10) |
| Cano, Melchor (2) |
| Carnéades (3) |
| Carranza, Bartolomé (4) |
| Cassirer, Ernst (8) |
| Castellanos Taquechel, Jorge (2) |
| Castoriadis, Cornelius (11) |
| Charron, Pierre (1) |
| Châtelet, Madame de@ (2) |
| Chomsky, Noam@ (2) |
| Church, Alonzo (1) | |
| Cioran, Émile (18) |
| Cixous, Hélène (1) |
| Clarke, Samuel (1) |
| Colli, Giorgio (3) |
| Collins, John Anthony (1) |
| Comte, Augusto (10) |
| Condillac, Étienne Bonnot de (4) |
| Condorcet, Marqués de (2) |
| Confucio@ (2) |
| Cortina, Adela (4) |
| Crates (1) |
| Crisipo (2) |
| Croce, Benedetto (4) |
| Cruz, Sor Juana Inés de la@ (10) |
| Cusa, Nicolás de@ (4) | |
