Geryon.

Geryon (Γηρυών) was a giant in Greek mythology. His parents were Chrysaor (Χρυσάωρ) and Callirrhoe (Καλλιρρόη). Also, Geryon was the grandson of Medusa (Μέδουσα) and the nephew of Pegasus (Πήγασος).

Heracles (Ἡρακλῆς) killed Geryon during his tenth labor.