Why not Ecthelion?

[Galin]

Originally Posted by Elmo

Plenty of elves permanently die, none of the Moriquendi were reborn. I'm sure it's Morgoth's Ring where it's said the Dark Elves were seen in the Halls of Mandos but did not speak to the Eldar.

I can't agee. As far as I'm aware, generally speaking, all Elves had the potential to be reincarnated. What passage in Morgoth's Ring states otherwise?

In Morgoth's Ring CJRT states something incorrect about Elven reincarnation with respect to his father's 'final' intent -- later corrected by CJRT in the notes to the Glorfindel essays in any case -- although if I recall correctly it wasn't about the issue you raise here.

So, just a general caution for employing MR when it comes to Elven reincarnation.