Well lets see I think that there is good reason to think it is. From what I know there exists in the greek mythology a pantheon of gods. That means there exists seperate dieties in different structures. For example: Pan is one and Zeus is another and so on. Other immortals include but are not limited to the following:
Olympian deities
Protogenoi (primordial deities)
Titans
Gigantes (giants)
Personified concepts
Chthonic deities
Sea deities
Sky deities
Rustic deities
Agricultural deities
Deified mortals

Mike