A short note about the name of a Buddhist language.
The name of the language might have been 500-600 old, but not older. I am not absolutely sure , but I think that this present name might be traced back to the 15th century if not the end of the 14th century CE(or 1850 - 1950BE if you prefer a Buddhist chronology).
AggavaMsa referred to the language he described as "Maagadhabhaasaa".(12th century)
Of course that the word "Paali" had existed before it became known as a name of the Theravaada language.