The Sindarin equivalent of Q. Teler, used only by the people of Círdan and attested only in the plural forms Telir and Telerrim (PM/385). It may be that its singular form was not used.
Conceptual Development: In the Gnomish Lexicon from the 1910s, the earliest form of this name was G. Tilith (GL/70), though at this stage the name referred to the first tribe instead of the third. In Early Noldorin notes from the 1920s, it became ᴱN. Tiledh, a reference to the sea-elves (PE13/154).
A similar term teleir appears in Notes on Names (NN) from 1957, where Tolkien indicated that it was used “as a general term distinguishing Sindar (and usually also Nandor) from either the Noldor and the Dark-elves” (PE17/139). The term teleir developed from the primitive adjective ✶teleryā, and appeared beside variants telerion and telerieth, probably male and female forms. These notes also included several plural forms: telir, teleriath and telerwaith.
pl1. telir, pl2. teleriath, telerwaith _ n. _it became current as a general term to distinguish the Sindar (and usually also the Nandor) from either the Noldor or the Dark-Elves.