The Olympians are composed of 13 Gods. They were Zeus, Supreme Ruler, Poseidon, Ruler of the Seas and Hades, Ruler of the underworld were the commanding Gods. The others were Hera, Ares, Athena, Apollo, Artemis, Aphrodite, Demeter, Dionysus, Hermes and Hephaestus.
The Gods' powers are different from each other and have also their own devotees.
(Click on one of the links. Each page has the given named gods)