» Philosophers
- Confucius
- Critias
- Cudworth, Ralph
- Cumberland, Richard
- Dai Zhen
- Damon
- Davidson, Donald Herbert
- De Chantal, Jeanne-Françoise Frémyot, baronne
- Deleuze, Gilles
- Democritus
- Demonax
- Derrida, Jacques
- Descartes, René: Overview
- Descartes: Scientific Method
- Deshoulières, Antoinette du Ligier de la Garde
- Dewey, John
- Diderot, Denis
- Diogenes Laertius
- Diogenes of Apollonia
- Diogenes of Sinope
- Donoso Cortés, Juan
- Du Bois, William Edward Burghardt
- Dummett, Michael
- Durkheim, Émile
- d’Andilly, Angélique de Saint Jean Arnauld
- Eckhart, Meister
- Ellacuría, Ignacio
- Emerson, Ralph Waldo
- Empedocles
- Epictetus
- Epicurus
- Euclides
- Fazang (Fa-tsang)
- Fedorov, Nikolai Fedorovich
- Felix, Minucius
- Feng Youlan (Fung Yu-lan)
- Ferrier, James Frederick
- Fichte, Immanuel Hermann
- Fichte, Johann Gottlieb
- Ficino, Marsilio
- Fodor, Jerry
- Foucault, Michel
- Frantz Fanon
- Frege, Gottlob
- Freud, Sigmund
- Galen
- Ge Hong (Ko Hung)
- Goethe
- Gorgias
- Gregory of Nyssa
