Chrysaor

Chrysaor was an offspring of Poseidon and the Gorgon Medusa. When Perseus decapitated Medusa, some blood fell on the earth and the sea. Pegasus sprang out of the sea, while Chrysaor was born where the blood fell on land. Chrysaor was fully armed when he was born.

It's not certain if Chrysaor was a human or a monster. The writers were never clear, but he could be a giant. Chrysaor married Callirrhoe, daughter of Oceanus and Tethys. Chrysaor was the father of Geryon.