The MAJOR OLYMPIANS
ZEUS: A father of gods, sky thunder and king of Mt.Olympus. A husband of Hera and represent as an eagle and thunderbolts.
HERA: A Mother of gods, goddess of family, marriage and jealousy. A wife of Zeus and represent as a peacock.
POSEIDON: A god of sea and brother of Zeus and Hades. Represent as a dolphin and trident.
DEMETER: A goddess of nature, season and agriculture, represent as a wheat and torch.
ATHENA: A goddess of wisdom, born in Zeus' head. Represent as an olive tree.
APOLLO: A god of light and knowledge,he is a twin brother of Artemis. Represent as a sun. He loves art, music and poetry etc..
ARTEMIS: A goddess of virginity and moon, she is a twin sister of Apollo. Represent as a moon, and deer.
ARES: A god of war, one of 3 son of Zeus and Hera. Represent as a dog and spear.
APHRODITE: A goddess of beauty, desire and love. She is a wife of Hephaestus and represent as a dove and rose.
HEPHAESTUS: A god of fire, made Zeus, Poseidon and Hades' main weapons. He is a husband of Aphrodite and represent as a hammer and fire.
HERMES: A god of messenger, thief and games. Represent as a winged sandals and cap.
HESTIA: Goddess of hearth, the oldest child of Cronus and Rhea. She was one of the great 12 Olympians but she gave her place to Dionysus.
DIONYSUS: God of wine, represent as a grapevine and he is the youngest Olympians.
Source:http://en.wikipedia.org/wiki/Twelve_Olympians