Brilthor was one of the six swift rivers that flowed westward from the mountains of the Ered Luin to meet the long course of the Gelion on the borders of Ossiriand. The Brilthor lay between the rivers Legolin and Duilwen.
Brilthor is said to mean "glittering torrent" in Ilkorin, from bril ("glass, crystal") and thôr ("swooping, leaping down").
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Map of Beleriand and the Lands to the North"
- ↑ J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, "Part Three: The Etymologies", pp. 372 (root MBIRIL), 392-3 (root THOR-, THORON-)