Section title of a late version of the poem, “The Trees of Kortirion” (LT1/43). The initial element of the name seems to be metta “end”. Its final element may be the 1st person pronominal suffix -n(yë). If so, metta- here might be used as a verb and the full the word might mean “✱I End”.
Quenya
metta
end
metta
noun. ending, end
mettanyë
proper name. ?I End
mettarë
proper name. last day of the year, *(lit.) end-day
The last day of the year in the calendar of Imladris and the Steward’s Reckoning (LotR/1108-9), a compound of metta “ending” and ré “day”.
Conceptual Development: In drafts of the Lord of the Rings appendices from the 1940s, the last day of the year was first given as ᴹQ. Qantarie “Day of Completion, Oldyear’s Day” (PM/127), where its first element was ᴹQ. qanta “full”. Later in the drafts it was given as ᴹQ. Mettare “Year’s end” (PM/134).
tyel
end
tyel (1) noun "end", stem tyeld- as in the pl. form tyeldi (FS, KYEL; the pl. form tyeldi_ was misread as "tyelde" in the Etymologies as printed in LR; cf. VT45:25 for this correction)_. Cf. tyelma.
tyel-
end, cease
tyel- (2) vb. "end, cease" (KYEL)
tyelma
ending
tyelma noun "ending" (FS, VT45:25)
tel
noun. end
metta noun "end"; Ambar-metta "world-end, the end of the world" (EO); mettarë *"end-day" = New Years' Eve in the Númenórean calendar and the Steward's Reckoning, not belonging to any month (Appendix D). The word Mettanyë, heading the final part of the poem The Trees of Kortirion, would seem to be related (LT1:43)