Makedon, also Macedon (Ancient Greek: ) or Makednos (Μακεδνός), was the eponymous mythological ancestor of the ancient Macedonians according to various ancient Greek fragmentary narratives. In most versions, he appears as a native or immigrant leader from Epirus, who gave his name to Macedon, previously called Emathia or Thrace.
Both proper nouns Makedṓn and Makednós are morphologically derived from the Ancient Greek adjective makednós meaning "tall, slim", and are related to the term Macedonia. The adjective is traditionally derived from the Indo-European root *mak- or *meh2k-, meaning "long, slender", cognate with poetic Greek makednós or mēkedanós "long, tall", Doric mãkos and Attic mẽkos "length",Makistos, the mythological eponym of a town in Elis and an epithet of Heracles, Avestan masah "length", Hittite mak-l-ant "thin", Latin macer "meagre" and Proto-Germanic *magraz "lean, meager". The same root and meaning has been duly assigned to the tribal name of the Macedonians, which is commonly explained as having originally meant "the tall ones" or "highlanders" in Greek.
Taking a different course, constructed a Macedonian word kedôn, out of the Greek chthṓn "earth", but in the event proposed as well a meaning of "high land" for the same word. More recently, Robert S. P. Beekes claimed that the morphological analysis make- (root) + -dn-ós (suffixes) is impossible in an Indo-European word and that it is more likely that the word has a Pre-Greek origin. According to Beekes, both terms are of Pre-Greek substrate origin and cannot be explained in terms of Indo-European morphology.