"What is the relationship between the Fryans and the Aryan peoples?"
For me:
Fryans seem to have come via Indus to Pungab when Vedic era started (approx 1500 BC)
But Vedic scriptures have all the imprints of a priestly scripture, the band the Fryans wanted to avoid and turned to Iran.
The priests at that moment were also called foreign by the Fryans.
Fryans didn't fought to settle, matches latest insight the Aryan invasion is corrected to 'migration'.
BUT seems we have to do with 'migration' in 2 steps (priests from North + Fryan Geertmanne from South)!

In between a parallel escape migration to Iran.
Maybe that is the problem with 'constructs' as Aryan.
On the otherhand Aryan is used in the Veda's as actual describing Arjuna's state.
He's an Aryan because of the fierce fight for Justice -> a warrior who opposes suppression (can imagine with Ire) opposed to the timid and following Hindoos.
Krsna said to Arjuna: "This is not for the Aryan. You are ksatriya, you are meant for fighting for justice, and you are denying to fight? Oh, this is not good. This kind of proposal, cowardice, can be proposed by the anarya
So Aryan isn't only a construct from the English?
And how can Fryans be Aryans if Veda priests are also part of that Aryan construct.