Old MACEDONIAN

What is OLD MACEDONIAN exactly?? Not Macedonian the Slavic tongue..
but Macedonian, like Alexander the Great the Phil-Hellene.. Some
say, it's a mixture of Thracian and Illyrian.. personally, I guess
so... but I really don't know for sure.
Some say it's Hellenic.. but it can't be! The Macedonian Kingdom was
somehow Hellenized, the language and all (therefore previously non-
Hellenic), and those same Macedonians were reffered to as barbarians
by the Greeks. Is there a real genuine "Old Macedonian" language, a
language that is relative to another IE tongue -- I mean, not just a
mixture of Thracian and Illyrian?

P.S. Thracian is related to the Germano-Balto-Slavic group, right?

Peace out,
PHIL