In Greek mythology, Chrysaor (Greek: Χρυσάωρ, Khrusaōr, gen.: Χρυσάορος; English translation: "He who has a golden sword" (from χρυσός, "golden" and ἄορ, "sword")), the brother of the winged horse Pegasus, was often depicted as a young man, the son of Poseidon and the Gorgon Medusa. Chrysaor and Pegasus were not born until Perseus chopped off Medusa's head.

Testbed, attempt to implement and explore Powered Explicit Guidance Ascent System, in short - PEGAS. PEGAS can be seen as a short for Pegasus, and Chrysaor is the brother of the Pegasus, thus the name.