For example:
* Alexander: Means "defender of mankind."
* Sophia: Means "wisdom."
* Nicholas: Means "victory of the people."
* Athena: The name of the Greek goddess of wisdom, warfare, and crafts. The meaning is tied to her attributes.
* Zeus: The name of the king of the Olympian gods, signifying power and authority.
To understand the meaning of a specific Greek name, you'll need to look it up in a resource dedicated to onomastics (the study of names). Many online resources and books are available.