Yes and no. Mythologically speaking it's like what Angry Newbie said, but bear in mind mythology is just that, and the Greeks seem to have attributed a Hellenistic origin to a wide swathe of peoples. However there does seem to be something of a primordial greek connection with the Thracians judging from the Thracian's phrygian offspring. Phrygian language had a lot of similarities with the greek's, the title of warchief/commander being a near perfect cognate to the Linear B Lawagetai (no relationship to getai) of the Mycenaeans.
