Proto-Greek

The Proto-Greek language is the assumed last common ancestor of all known varieties of Greek, including the Mycenaean language, the classical Greek dialects Attic-Ionic, Aeolic, Doric and North-Western Greek, and ultimately the Koine 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.
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