The Duilwen was one of the six rivers that flowed west through Ossiriand to meet Gelion. The Duilwen was the last-but-one of these to flow into the great south-flowing river; only the Adurant was further south.
Duilwen can probably be considered as a Sindarin name, but was originally conceived as Ilkorin by Tolkien, consisting of the Ilkorin elements duil ("river") and gwene ("green"). Helge Fauskanger has suggested that the element -wen is a "lenited and shortened form of gwene".
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Silmarillion, "Map of Beleriand and the Lands to the North"
- Robert Foster, The Complete Guide to Middle-earth, entry "Duilwen"
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Lost Road and Other Writings, Part Three: "The Etymologies", pp. 355 (DUI-), 359 (GWEN-)
- "Compound Sindarin Names in Middle-earth", Tolkiendil.com (accessed 28 January 2013)
- Helge Fauskanger, "Ilkorin - a "lost tongue"?", Ardalambion (accessed 28 January 2013)
|Seven Rivers of Ossiriand|
|Gelion · Ascar · Thalos · Legolin · Brilthor · Duilwen · Adurant|