Fimbrethil meaning "slim-birch" was the Sindarin name of Wandlimb, Treebeard's long-lost entwife.
Fimbrethil contains the word brethil "birch" and also the otherwise unattested *fim which has the meaning of "slim, slender".
- ↑ 1966 Index
- ↑ J.R.R. Tolkien, The Lord of the Rings, Appendix F