Qenya name of the “Gong Warden” of Cottage of the Lost Play (LT1/52), a character that does not appear in Tolkien’s later writings.
Conceptual Development: The name first appeared as ᴱQ. Elwenil(do), a diminutive form of ᴱQ. elwen “heart” (LT1A/Ilverin, LT2/202), a word appearing in the Qenya Lexicon from the 1910s (QL/35, 52). Tolkien apparently revised its etymology, but the revised form of its initial element does not appear, though its Gnomish equivalent does: G. ilf (GL/50).
A noun in the Qenya Lexicon of the 1910s described as “sky, heavens, the blue air that is about the stars, the middle layers”, derived from the root ᴱ√ILU “ether, the slender airs among the stars” (QL/42). Hence it was above the lower airs (where people breathed) and below the upper airs (outer space); this arrangement of lower, middle, upper airs is one that Tolkien eventually abandoned in his later writings.