I'm talking about the ethnic term, not the region. Pan-Iranists talk about the name of the region. A regional name is just a regional name, nothing to do with ethnicity. But as you see, our ethnic name was derived from a regional name. Goes to show how incorrect it is in first place. It should actually be a nationality, like Iranian, not an ethnicity. That way it would be correct.
I understand your point. But, when a name is used for hundreds of years for a region, the situation would be different. I mean, foreigners will call them by the name of the region after passing some time.
Anyways, my main problem is about genetics. If we are really turk, why our genetic shows that we are more close to caucasus people and Iranians?