Lhamthanc is mentioned, next to Gostir , in The Etymologies as a "serpent-name" and possibly denotes a dragon. Otherwise Lhamthanc is not mentioned in any other known story.
In Noldorin, Lhamthanc means "forked tongue".
- ↑ 1.0 1.1 J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", p. 388