Earth, Water, Fire, Air, and Æther (quintessence).
Æther was the offspring of Erebus and Nyx, and the brother of Hemera. In Orphic cosmogony Aether was the offspring of Chronus (Time), the first primordial deity, and the brother of Chaos and Erebus. In Roman genealogies of the gods. Cicero says that Æther and Dies (Day) were the parents of Caelus (Sky). In Homeric Greek means “pure, fresh air” or “clear sky”.
Derveni Thogony:
“When Zeus had heard the prophecies from his father, he swallowed the revered one [or phallus], who [or which] sprang forth first into the aither [or who first ejaculated aither].”