Having done away with the obstacle provided by the theory of the trans-Caucasian migration..., we can see both these peoples as western branches of t… - Gherardo Gnoli

A much more convincing theory than that of the western Iranians having emigrated from North to South across the Caucasus is that of a slow, progressive East-West emigration, a gradual penetration as it were, over the centuries, from the end of the 2nd millennium to the first half of the 1st millennium B.C. ...

[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.” ...

The foregoing leads us to believe that the answer which we gave earlier, at the beginning of this chapter, to the question as to whether we ought to see a sort of continuity and a close link between the western Aryas, the Medes and the Persians and the Airyas of the Avestan people, is a well grounded one. We can reply that the Aryas who became part of the ethnic groups of the Medes and the Persians were none other than western branches of the Avestan Airyas who, in their westward migrations, had taken with them the name Aryan and so had extended, in a way, the boundaries of Ariana proper.