The son of Medusa and Poseidon, Pegasus was birthed from the blood of his mother's decapitation. Although closely related to many of ancient Greece's most vile monsters, Pegasus was largely non-aggressive. In fact he aided the hero Bellerophon in slaying his own cousin the Chimera.
Pegasus
'Birthed' from the neck of his decapitated mother Medusa, Chrysaor went on to become king of Iberia (the peninsula containing Andorra, Gibraltar, Spain and Portugal) and fathered the three-bodied Geryon. Chrysaor himself (and his brother Pegasus) was fathered by Poseidon.
Callirrhoe was one of the 3000 Oceanids, female spirits of the world's water sources. She married King Chrysaor and was the mother of the three-bodied giant Geryon. Some sources claim she was also a lover of Poseidon... which is kinda awkward as he is Chrysaor's father.
Geryon was a three-bodied giant who lived on the "sunset" island of Erytheia, where he raised a heard of red cattle with the help of his two-headed dog Orthrus and a (seemingly normal human) herdsman named Eurytion. All three (or was that six?) met their ends when Hercules was sent to retrieve the cattle as one of his legendary labors.
