1) Bury & Meiggs (1985) “A History of Greece”, page 415
The Macedonian people and their kings were of Greek stock, as their traditions and the scanty remains of their language combine to testify.
2) H. Bengston (1988) “A History of Greece: from the beginnings to the Byzantine era”, page 186.
Bengston makes the following statement pertaining to the origins of the Macedonians:
They should be included in the group of North-West Greek tribes.
On the same page he also states that :
The majority of modern historians have correctly argued for the Hellenic origin of the Macedonians.