Thales of Miletus
Thales was a Pre-Socratic philosopher who was counted one of the seven sages.
Theophrastus - Philosopher and Author of the Characters
Theophrastus followed his teacher Aristotle as head of the Lyceum school.
The Greek philosopher Xenophanes was the founder of the presocratic school of philosophy known as the Eleatic school of philosophy.
Zeno of Citium
Zeno of Citium, a philosopher, was the founder of the Stoic philosophy.
Zeno of Elea
Zeno of Elea was a Pre-Socratic philosopher known for his puzzling paradoxes.