Zeus wife is Hera, Zeus children Apollo, Athena, Ares, Artemis, Dionysus, Hephaestus, Hermes. Zeus brother and sister are poseidon, Hades, Demeter, Hestia, and Hera. Mother of Zeus is Rhea, father of Zeus is Cronus other relatives of Zeus would be Perseus and Aphrodite.
This shows Zeus and his brothers who are Hades and Poseidon. They are called the big three. Zeus is the ruler of the sky, Poseidon is the ruler of the Oceans, and Hades is the ruler of the under world.