Ir Ithil ammen Eruchín

"Ir Ithil ammen Eruchín" is the first line of a poem written by J.R.R. Tolkien that was posthumously published in The Lays of Beleriand in 1985.

Though Tolkien never gave the poem a name, it is referred to by some people as Lúthien's Song, a term first used by Patrick H. Wynne, who analyzed the poem in 1990. The poem was also analyzed by David Salo in his 2004 book, A Gateway to Sindarin.