Consider this: There is a bunch of countries in the U.N. that has the word "democratic" in their name. Democratic People´s Republic of Korea is a shining example. One can very easily argue that the DPRK´s regime has very little, if anything, in common with "true" democracy, that that boastful name is an insult to all really democratic countries, that DPRK is hardly even a "republic".
True, but once someone recognize that a state does exist, than he should not question the state´s name.
Now consider Macedonian Republic. It could be argued that it does not have much in common with historical Macedonia - neither in terms of geography nor in terms of demography. It is neither all of Macedonia (part is in Bulgaria, part belongs to Greece) nor its a republic of all Macedonians.
Maybe, but once someone recognize that a state does exist (and even Greece does), ... Well, you ´ve got the point...