What do you call a greek ruler?

A Greek ruler is commonly referred to as a "king" or "tyrant," depending on the historical context. In ancient Greece, city-states like Athens and Sparta had different forms of governance, including monarchy, oligarchy, and democracy. The term "archon" was also used for specific magistrates in Athens. In a broader sense, "hegemon" can refer to a leader or ruler of a dominant city-state or alliance.