Zeus (zju:s; ) is the sky and thunder god in ancient Greek religion, who rules as king of the gods on Mount Olympus. His name is cognate with the first syllable of his Roman equivalent Jupiter.
Zeus is the child of Cronus and Rhea, the youngest of his siblings to be born, though sometimes reckoned the eldest as the others required disgorging from Cronus's stomach. In most traditions, he is married to Hera, by whom he is usually said to have fathered Ares, Eileithyia, Hebe, and Hephaestus. At the oracle of Dodona, his consort was said to be Dione, by whom the Iliad states that he fathered Aphrodite. According to the Theogony, Zeus' first wife was Metis, by whom he had Athena. Zeus was also infamous for his erotic escapades. These resulted in many divine and heroic offspring, including Apollo, Artemis, Hermes, Persephone, Dionysus, Perseus, Heracles, Helen of Troy, Minos, and the Muses.
He was respected as an allfather who was chief of the gods and assigned roles to the others: "Even the gods who are not his natural children address him as Father, and all the gods rise in his presence." He was equated with many foreign weather gods, permitting Pausanias to observe "That Zeus is king in heaven is a saying common to all men". Zeus' symbols are the thunderbolt, eagle, bull, and oak. In addition to his Indo-European inheritance, the classical "cloud-gatherer" (Greek: Νεφεληγερέτα, Nephelēgereta) also derives certain iconographic traits from the cultures of the ancient Near East, such as the scepter.
The god's name in the nominative is Ζεύς (Zeús). It is inflected as follows: vocative: Ζεῦ (Zeû); accusative: Δία (Día); genitive: Διός (Diós); dative: Διί (Dií). Diogenes Laërtius quotes Pherecydes of Syros as spelling the name Ζάς.
Zeus is the Greek continuation of *, the name of the Proto-Indo-European god of the daytime sky, also called * ("Sky Father"). The god is known under this name in the Rigveda (Vedic Sanskrit Dyaus/Dyaus Pita), Latin (compare Jupiter, from Iuppiter, deriving from the Proto-Indo-European vocative *), deriving from the root *dyeu- ("to shine", and in its many derivatives, "sky, heaven, god").