Question about a Roman name

[ValentinianVictrix]

But when "Goths" start to call themselves "Goths"? Isnt just Jordanes calling them like that? Or wasnt this just in some writings of scholars educated by reading some Roman archives?

I wonder how Shapur I knew about the Goths? :?

Do we know exactly how far the Gothic territory extended eastwards? We know that before the arrival of the Huns the Goths had engaged in warfare with the Alans, and I presume that the Alans were living more to the east, and possibly raiding into Sasanid territory. I suppose its just possible that the Alans could have traded Gothic prisoners as slaves with the Sasanids?