|Lethuin is a concept which has only appeared in an adaptation of the works of J.R.R. Tolkien.|
|"Lethuin" from The Hobbit: The Desolation of Smaug|
|Gallery||Images of Lethuin|
Lethuin helped capture Thorin and Company while they were in Mirkwood, and was later seen in the cellar conversing with Galion while Bilbo Baggins was searching for a means of helping the Dwarves escape.
Lethuin is obviously an anagram of the canonical name Lúthien (the same way certain other background characters were given names of that nature throughout the Peter Jackson films). However, there is no actual background or etymology behind it.