Zeno of Citium was born in -334.

The school of philosophy founded by Zeno of Citium is known as Stoicism.

Stoics

There are two Greek philosophers called Zeno - Zeno of Elea and Zeno of Citium. Only Zeno of Citium actually founded a school - the Stoic school in Athens. His followers were initially called Zenonians, but were soon renamed as the famous Stoics.

Very little is known of Zeno of Elea. It is not known if he founded a school, but he was part of the Eleatic school as founded by Parmenides. I presume you mean Zeno of Citium.

Zeno of Citium was the founder of the Stoic school of philosophy in Athens. He taught Plato and Aristotle and Protagoras.