He's captured during the Bragollach, so we may want to work it out soon.
I'd vote for renaming Gwindor's brother. Gelmir and Arminas have fairly significant roles in 2 different stories, even if it will only account to two episodes, total; while Gwindor's brother is simply there to be captured and later slaughtered. And since he will be captured this season, we won't have much time to build him up before then.
What do we rename him to then?
I know I'll be thrown under the bus for it, but given that their father plays literally no part in the story, we could give him their father's name, Guilin.
Speaking of the Houses of Gondolin, we should make the decision about whether or not we should have Turgon send his most trusted captains to accompany Aredhel. I say "yea" because it speaks a bit about Turgon's character that comes up later in the Eöl situation: he's very protective of Aredhel so he would likely send his best to protect her. How it comes up in the Eöl situation is that he ignores Aredhel's pleading for Eöl's life on her deathbed and executes him.
I think it's funny, but I thought we were trying to stray from funny names, otherwise we'd still have Elmo...
Not throwing you under the bus, but I'm not in favor of calling Gelmir Guilin. Even if we don't have Guilin appear, we would probably refer to Gwindor and [Gelmir] as the sons of Guilin at some point.
So would we swap Guilin and Edrahil's fates? Because in the book Edrahil is the leader of the 10 Elves who accompany Finrod and Beren and apparently in the Book of Lost Tales Guilin is still alive when Gwindor returns to Nargothrond with Túrin in tow.
No, if we have Guilin as one of Finrod and Beren's companions, I would want it to be in addition to Edrahil, not instead of. While Guilin (then called Fuilin) is in Nargothrond when Gwindor (then called Flinding) returns in The Lays of Beleriand, I couldn't find any reference to Guilin being in Nargothrond when Gwindor returns in either The Silmarillion or The Children of Hurin. I think we could probably choose what we want to happen to Guilin.
Looking at supporting roles: We'll also need a name for Elves freed by Luthien and knows his way back to Nargothrond to tell Orodreth of Celegorm and Curufin's treachery. Oropher is a likely candidate for the Sinda of Doriath, but what about Nargothrond? Is this where we'd introduce Gildor?
The former, I think.
I am fairly certain that we talked about including Inglor among Finrod’s companions (but this was perhaps during a season three discussion?). I think we definitely should.
What about using some discarded name? Gumlin? Or Tamar or Bethos or something like it... or Galion