There is no evidence for thinking that the Zoroastrian message was meant for the Iranians alone. On the-contrary, history suggests that the exact opp… - Gherardo Gnoli

“With Varana and Ranha, as of course with Hapta Handu, which comes between them in the Vd. I list, we find ourselves straight away in Indian territory, or, at any rate, in territory that, from the very earliest times, was certainly deeply permeated by Indo-Aryans or Proto-Indoaryans.” ...

[Likewise, in later Greek tradition, Ariane] “is the Greek name which doubtless reflects an older Iranian tradition that designated with an equivalent form the regions of eastern Iran lying mostly south, and not north, of the Hindukus. It is clear how important this information is in our research as a whole.” ...

“we may consider that the northernmost regions where Zoroaster carried out his work were Bactria and Areia”. ...