Last peak of the Mist Mountains (LotR/429), explictly translated “Last Peak” in Tolkien’s “Unfinished Index” of The Lord of the Rings (RC/366). This name is a combination of methed “end” and rass “horn”.
Conceptual Development: In Lord of the Rings drafts from the 1940s, this name first appeared as N. Methen Amon (TI/391), later revised to N. Methendol and finally N. Methedras (TI/404). These earlier forms clearly included the Noldorin adjective N. methen “end, final” (Ety/MET). It is possible that this is true of the initial appearance of N. Methedras as well (as suggested by Roman Rausch, EE/2.63), since phonetically the combination [[n|[nr] became [ðr]]], and Tolkien often represented [ð] as “d” in the Lord of the Rings drafts. For example, N. Caradras >> S. Caradhras underwent the same development.
Unlike Caradhras, however, Tolkien never revised this form to ✱✱Methedhras. This could have been an oversight, or Tolkien could have reconceived of the initial element as the noun methed “end” seen in Methed-en-Glad, as suggested above (and by David Salo, GS/384).
methed (“last”) + ras (“horn, mountain peak”) The original form of ras is probably rass with the final s dropped at the end of a polysyllable [HKF].