He is the youngest son of the Titans Cronus and Rhea, and brother of Poseidon, Hades, Hera, Demeter, and Hestia.
Consorts & Children:
By Hera, his sister and wife, he's the father of Hebe, Ares, Eris ("strife"), and Eileithyia, goddess of childbirth, though he's also fathered numerous other progeny by goddesses and mortals alike, notable among them being Apollo and Artemis, Heracles, Dionysus, Athena, and Hermes.
Notable Stories Involving Him:
Being the youngest of his siblings, Zeus really should've been relegated to the Underworld, but after overthrowing his father Cronus, he tricked Hades and Poseidon into drawing lots with him. In this way, he became ruler of the sky, and the Underworld became Hades's domain.
Sacred to him are eagles, bulls, and oak trees, and his attribute is a thunderbolt.
Zeus Around the World:
His Roman equivalent is Jupiter, though he's also been identified with the Etruscan Tinia, the Celtic Dagda, and the Norse Odin.
SOURCES: Greek Mythology.com, Encyclopedia Mythica, & Wikipedia