High Quality Content by WIKIPEDIA articles! The Proto-Greek language is the assumed last common ancestor of all known varieties of Greek, including Mycenaean, the classical Greek dialects (Attic-Ionic, Aeolic, Doric and Arcado-Cypriot), and ultimately Koine, Byzantine and modern Greek. Some scholars would include the fragmentary ancient Macedonian language, either as descended from an earlier "Proto-Hellenic" language, or by definition including it among the descendants of Proto-Greek as a Hellenic language and/or a Greek dialect. Proto-Greek would have been spoken in the late 3rd millennium BC, most probably in the Balkans. The unity of Proto-Greek would have ended as Hellenic migrants, speaking the predecessor of the Mycenaean language, entered the Greek peninsula either around the 21st century BC, or in the 17th century BC at the latest.