The Proto-Greek language (also known as Proto-Hellenic) is the assumed last common ancestor of all known varieties of Greek, including Mycenaean Greek, the ancient Greek dialects (i.e., Attic, Ionic, Aeolic, Doric, Ancient Macedonian and Arcadocypriot) and, ultimately, Koine, Byzantine and Modern Greek. The unity of Proto-Greek would have ended as Hellenic migrants, who spoke the predecessor of the Mycenaean language, entered the Greek peninsula sometime in the Neolithic era or the Bronze Age.