No: Percy Jackson does not exist in Greek Myth- he is the creation of Rick Riodan.
Percy Jackson is a book character created by Rick Riordan, there are some true greek stories mentioned throughout the whole series, but Percy's amazing adventures are not real Greek stories.
The Greek God Posidion
In the 'Percy Jackson' series? Yes. In Greek Mythology? No.
Percy can read Ancient Greek well.
Greek Mythology is a study of Greek Gods and Goddesses'
Hal and Percy are two different people. They are characters from the Percy Jackson movies that are based off of Greek mythology.
A greek god did not kill Medusa. She was killed by Perseus, a famous greek hero.
She doesn't "say" anything, she just tosses a golden drachma (Greek money) into the street.
In Greek mythology, Perseus was not the son of Poseidon- he was the son of Zeus. In the fictional series 'Percy Jackson and the Olympians', Percy was the son of Poseidon, but that is never stated by actual sources for mythology.
In ''Percy Jackson and the Olympians'' Percy's father is Poseidon, the Greek god of the sea. In ''Clash of the Titans'' his father is Zeus.
It stands for the Greek hero Perseus