Peloponnese: The peninsula which contained Sparta, Corinth, Argos, Elis, and others. And is used today to refer to the the league Sparta led. It would be nice to use that as we have not actually named anything specifically after the Spartans. Anyway, the Peloponnesian war ushered forth the Hellenistic era of the Ptolemies, Seluecids, and so on; so having this name would be rather appropriate.