The Elven hymn to Elbereth is a song which was sung by a company of Elves, led by Gildor Inglorion, as they passed through the Shire in the late Third Age. It was overheard by Frodo Baggins, Samwise Gamgee and Peregrin Took. Although the elves would have been singing in Sindarin, of which Frodo knew only a little, he was still able to interpret the meaning of the song. Its content is similar to A Elbereth Gilthoniel, the part sung in the 2nd half in Elvish.  A Elbereth Gilthoniel or Aerlinn in edhil o Imladris is an aerlinn (poem) of Rivendell addressed to Varda, sung in Sindarin and in iambic tetrameter. The first stanza (the only one known) rhymes aababcc.

Translation
O Elbereth Starkindler
(white) glittering slants down
sparkling like jewels
from [the] firmament [the] glory [of] the star-host!
To-remote distance far-having gazed
from [the] tree-tangled middle-lands,
Fanuilos, to thee I will chant
on this side of ocean, here on this side of the Great Ocean!

Gildor Inglorion's Hymn to Elbereth from Lord of the Rings

Mike Aetherial