Zeus is the king of the gods. He is married to his sister Hera, though he often falls in love with other women, both mortal and immortal, whom he has had many children with, as well as three children with Hera: Ares, Hephaestus, and Eris. Thus giving him a reputation as a womanizer.
Zeus is the son of Kronos, who swallowed all of his previous children, but was saved by his mother Rhea who tricked Kronos by swapping Zeus with a rock. After cutting Kronos stomach saving his siblings inside, Zeus and the gods he freed overthrew the Titans and banished then to the Tartarus.
Some of Zeus' children include:
With Demeter
Persephone
With Metis
Athena
With Maia
Hermes
With Semele
With Leto
Apollo
With Alcmeme
Heracles
With Danae
Perseus