From Tolkien Gateway
Brilthorby Matěj Čadil

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.[1]


Brilthor is said to mean "glittering torrent" in Ilkorin, from bril ("glass, crystal") and a form of thórod ("torrent").[2]


Seven Rivers of Ossiriand
Gelion · Ascar · Thalos · Legolin · Brilthor · Duilwen · Adurant