Iranian or Arab Scholars?

It seems a truism that in modern day academia, all historical scholars who wrote in Greek are known as Greeks and all those who wrote in Arabic are known as Arabs. A curious fact is that all those scholars in all of medieval European Christendom who wrote in Latin are always referred to by their country of origin. Does this curious historical fact betray some form of cultural bias? The ancient Mediterranean Greek speaking world were a disparate group of cultures spreading from southern Italy through North Africa to Anatolia and western Mesopotamia. Even the Athenians considered themselves apart from Spartans and Macedonians and they were always in conflict.