Here is the same model about the Black sea coast but without the "Central farmer" component.

 Here is the same model about the Black sea coast but without the "Central farmer" component.

It's visible that in Western Georgia the Kartvelians do not score any Iran_Neo. While in the Eastern Pontic region, Trabzon Greeks and Turks, Hemshins and partly Laz do score some amount of Iran_Neo. Which obviously was introduced there from south-east or from southern regions.

My personal opinion is that debating obscure tribes about which we know just their names will not lead to any definite conclusion. What is more interesting is to see who lived in the Eastern Pontic and adjacent regions in the past. Let's say from Chalcolithic to Classic era.

Any increase of CHG will point to a migration from Western Caucasus/Georgia.

Any increase of Iran_Neo or Central farmers will mean a migration from south east, from the historic Armenia. Notice Iran_Neo here acts as a distal source. The real input was almost certainly higher and from a proximate source.

And finally any increase of Anatolian_Neo ancestry will mean a migration from Anatolia or maybe Europe. Although a migration from Europe must increase the Steppe/WHG also.

In my opinion all those migrations occured in that region, because it was acting both as a bridge between Anatolia and Western Caucasus. And as a refugium for migrants from south. Various tribes tried to find a refugium there. Those migrations are well visible in the Y DNA structure of local populations also.