Eros, along with Gaea, was the child of Chaos in early Greek mythology. He represented the creative principle of attraction that brings beings together, establishes friendships and marriages, creates cities, and so on. In later myths he was the son of Aphrodite and represented lust.
The Cyclopes were one-eyed monsters, the children of Gaea and Uranus. There were at first three of these storm-demons, and they represented the thunder, lightning, and the thunderbolt. They helped Zeus against the Titans.
The Hecatoncheires were three more monsters produced by Gaea and Uranus. Each had fifty heads and a hundred arms of prodigious strength. These creatures represented the cataclysmic forces of nature. Briareus was distinguished by the fact that he once served as Zeus's bodyguard. Together they helped Zeus defeat the rebellious Titans.
The Giants were generated by Uranus' blood when Cronus mutilated him. Eventually they became powerful enough to attack the whole Olympian order and were vanquished only after an earth-shattering battle.
The Furies, who pursued and punished sinners, also sprang from the blood of Uranus. Specifically, they punished matricides.
