Persians as many caucus families had regions that expanded all the way to Turkey not just Iran. Persia was not a border country. These indo Euro families come from the caucus regions that migrated west into Europe and East into india. kurdish people, slavic people, Armenians, Persians, Greeks, and their neighboring civilizations like Assyrians, Babylonians, and Phoenicians lived near each other. Everyone wants to play the oh that is my land not yours, to be honest they all had part around those regions and sometime somewhere in the past all come from one tribe that split into two, three, four, and so on. Research shows indo family languages link.