Neoptolemus (; Greek: Νεοπτόλεμος, Neoptolemos, "new warrior"), also called Pyrrhus (; Πύρρος, Purrhos, "red", for his red hair), was the son of the warrior Achilles and the princess Deidamia in Greek mythology, and also the mythical progenitor of the ruling dynasty of the Molossians of ancient Epirus.