Zeus is the sky and thunder god in ancient Greek religion and mythology, who rules as king of the gods on Mount Olympus. His name is cognate with the first syllable of his Roman equivalent Jupiter.

In comparative mythology, sky father is a term for a recurring concept in polytheistic religions of a sky god who is addressed as a "father", often the father of a pantheon and is often either a reigning or former King of the Gods. The concept of "sky father" may also be taken to include Sun gods with similar characteristics, such as Ra. The concept is complementary to an "earth mother".