Hesiod first mentioned 'Makedon', the eponym of the people and the country, as a son of Zeus, a grandson of Deukalion, and so a first cousin of Aeolu… - N. G. L. Hammond

What language did these Macedones speak? The name itself is Greek in root and in ethnic termination. It probably means highlanders, and it is comparable to Greek tribal names such as `Orestai' and `Oreitai', meaning 'mountain-men'. A reputedly earlier variant, `Maketai', has the same root, which means `high', as in the Greek adjective makednos or the noun mekos. The genealogy of eponymous ancestors which Hesiod recorded […] has a bearing on the question of Greek speech. First, Hesiod made Macedon a brother of Magnes; as we know from inscriptions that the Magnetes spoke the Aeolic dialect of the Greek language, we have a predisposition to suppose that the Macedones spoke the Aeolic dialect. Secondly, Hesiod made Macedon and Magnes first cousins of Hellen's three sons - Dorus, Xouthus, and Aeolus-who were the founders of three dialects of Greek speech, namely Doric, Ionic, and Aeolic. Hesiod would not have recorded this relationship, unless he had believed, probably in the seventh century, that the Macedones were a Greek speaking people. The next evidence comes from Persia. At the turn of the sixth century the Persians described the tribute-paying peoples of their province in Europe, and one of them was the `yauna takabara', which meant `Greeks wearing the hat'. There were Greeks in Greek city-states here and there in the province, but they were of various origins and not distinguished by a common hat. However, the Macedonians wore a distinctive hat, the kausia. We conclude that the Persians believed the Macedonians to be speakers of Greek. Finally, in the latter part of the fifth century a Greek historian, Hellanicus, visited Macedonia and modified Hesiod's genealogy by making Macedon not a cousin, but a son of Aeolus, thus bringing Macedon and his descendants firmly into the Aeolic branch of the Greek-speaking family. Hesiod, Persia, and Hellanicus had no motive for making a false statement about the language of the Macedonians, who were then an obscure and not a powerful people. Their independent testimonies should be accepted as conclusive.

Philip was born a Greek of the most aristocratic, indeed of divine, descent... Philip was both a Greek and a Macedonian, even as Demosthenes was a Greek and an Athenian...The Macedonians over whom Philip was to rule were an outlying family member of the Greek-speaking peoples.

All in all, the language of the Macedones was a distinct and particular form of Greek, resistant to outside influnces and conservative in pronunciation. It remained so until the fourth century when it was almost totally submerged by the flood tide of standardized Greek.