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| Aeschines | 70 |
| Alcmaeon | 338 |
| Anaxagoras | 51 |
| Anaxarchus | 364 |
| Anaximander | 49 |
| Anaximenes | 50 |
| Anacharsis | 49 |
| Antisthenes | 200 |
| Aristippus | 72 |
| Aristotle | 165 |
| Ariston | 292 |
| Arcesilaus | 149 |
| Archelaus | 54 |
| Archytas | 336 |
B. | |
| Bias | 30 |
| Bion | 155 |
G. | |
| Glaucon | 93 |
D. | |
| Demetrius | 192 |
| Democritus | 355 |
| Diogenes the Cynic | 206 |
| Diogenes of Apollonia | 363 |
| Diodorus | 88 |
| Dionysius | 294 |
E. | |
| Empedocles | 326 |
| Epicurus | 384 |
| Epimenides | 42 |
| Epicharmus | 335 |
| Eudoxus | 339 |
| Euclid | 86 |
Z. | |
| Zeno of Citium The founder of the Stoic school of philosophy. | 238 |
| Zeno of Elea | 351 |
H. | |
| The Hegesiacs A branch of the Cyrenaic school, followers of Hegesias of Cyrene, who were known for their pessimistic view that happiness is impossible to achieve. | 82 |
| Heraclides | 196 |
| Heraclitus | 342 |
| Herillus | 293 |
Th. | |
| Thales | 14 |
| The Theodoreans Followers of Theodorus "the Atheist," an offshoot of the Cyrenaic school who emphasized individual joy and criticized traditional religious views. | 83 |
| Theophrastus | 177 |
I. | |
| Hipparchia One of the few female philosophers recorded in antiquity; she was a member of the Cynic school and wife of Crates of Thebes. | 233 |
| Hippasus | 338 |
K. | |
| Carneades | 168 |
| Cebes | 94 |
| Cleanthes | 294 |
| Clitomachus | 164 |
| Cleobulus | 44 |
| Crantor | 148 |
| Crates the Athenian | 146 |
| Crates | 229 |
| Crito | 92 |