CHAOS (Emptiness)
KHAOS (or Chaos) was the first of the Protogenoi (primeval gods) to emerge at the creation of the universe. She was followed in quick succession by Gaia (Earth), Tartaros (the Underworld) and Eros (Love the life-bringer). Khaos was the lower atmosphere which surrounded the earth - invisible air and gloomy mist. Her name khaos literally means the gap, the space between heaven and earth.
GAIA (Earth)
Gaia was the great mother of all: the primal Greek Mother Goddess; creator and giver of birth to the Earth and all the Universe; the heavenly gods, the Titans, and the Giants were born to her. GAIA (or Gaea) was the Protogenos(primeval divinity) of earth, one of the primal elements who first emerged at the dawn of creation, along with air, sea and sky. She was the great mother of all : the heavenly gods were descended from her union with Ouranos (the sky), the sea-gods from her union with Pontos(the sea), the Gigantes from her mating with Tartaros (the hell-pit) and mortal creatures were sprung or born from her earthy flesh.
URANUS (Sky)

Ouranos - Uranus. Uranus the primal Greek god personifying the sky. His equivalent in Roman mythology was Caelus. In Ancient Greek literature,Uranus or Father Sky was the son and husband of Gaia, Mother Earth. Uranus, also known as Ouranos, was the embodiment of the sky or heavens, and known as the god of the sky. He was the first son of Gaia (the earth) and he also became her husband. According to Hesiod, their children included the Titans: six sons (Oceanus, Coeus, Crius, Hyperion, Iapetus and Cronus) and six daughters (Theia, Rhea, Themis, Mnemosyne, Phoebe and Tethys). There were other offspring: the Cyclopes, (who were named Brontes, Steropes and Arges and were later known as "one eyed giants"), and also the three monsters known as the Hecatonchires, who each had one hundred hands and fifty heads. Their names were Briareus, Cottus and Gyes. Other offspring of Uranus and Gaia were the Erinyes, who were spirits of punishment and goddesses of vengeance. The Erinyes avenged wrongs which were done to family, especially murder within a family. After Uranus had been castrated, his blood fell to earth (Gaia) and conceived the Giants. These were of monstrous appearance and had great strength. Similiarly, in some versions Aphrodite is believed to have risen from the foam created by the sex organs of Uranus after they were thrown into the sea by his son Cronus.
-
-

The Titans