In Greek mythology, the Dioskouroi (Διόσκουροι), Kastor an Polydeukes (Κάστωρ και Πολυδεύκης), in Roman mythology the Gemini (Latin, "twins") or Castores, Castor and Pollux, are the twin sons of Leda and the brothers of Helen of Troy and Clytemnestra. Castor means "beaver" in both Greek and Latin, and poludeukeis means "very sweet".