The indigenous peoples of Sicily, long absorbed into the population, were tribes known to ancient Greek writers as the Elymians, the Sicani and the Siculi or Sicels (from which the island derives its name). Of these, the last was clearly the latest to arrive and was related to other Italic peoples of southern Italy, such as the "Italoi" of Calabria, the Oenotrians, Chones, and Leuterni (or Leutarni), the Opicans, and the Ausones. It is possible, however, that the Sicani were originally an Iberian tribe. The Elymi, too, may have distant origins from outside Italy, in the Aegean Sea area. The recent discoveries of dolmens dating to the second half of the third millennium BC, seem to open up new horizons on the composite cultural panorama of primitive Sicily.