Pegasus (Ancient Greek: Πήγασος, romanized: Pḗgasos; Latin: Pegasus, Pegasos) is a winged horse in Greek mythology, usually depicted as a white stallion. He was sired by Poseidon, in his role as horse-god, and foaled by the Gorgon Medusa. Pegasus was the brother of Chrysaor, both born from Medusa's blood when their mother was decapitated by Perseus. Greco-Roman poets wrote about his ascent to heaven after his birth and his obeisance to Zeus, who instructed him to bring lightning and thunder from Olympus. Pegasus is the creator of Hippocrene, the fountain on Mount Helicon.
https://en.wikipedia.org/wiki/Pegasus