Paeonia disappeared during Roman times,was split between provinces of Moesia and Macedonia.
And actually the geographic name Macedonia exists long before Tito.
Republic of Macedonia was formed after ww2 within Yugoslavia and since 1991 is independent country.
The new country name should be Republic of North Macedonia.
Under the proposed agreement, the country's language will be called Macedonian and its people known as Macedonians (citizens of the Republic of North Macedonia).