Here we have seen that their early history is still largely an open question. They may have had Greek origins: Whatever process produced the Greek-speakers (of that is how one defines "Greek") who lived south of Olympus may have also produced the Makedones who wandered out of the western mountains to establish a home and a kingdom in Pieria.
pp. 277-278 - In the Shadow of Olympus: The Emergence of Macedon (1990)