Emyn Arnen was a cluster of hills in South Ithilien. The hills, being an outlier of the Ephel Dúath, were situated south of Osgiliath, on the east bank of the Anduin, which made a loop around their feet.
The name Emyn Arnen translates as "the hills of Arnen" (cf. emyn). One historian of Gondor claimed that Arnen was likely a word invented by the Númenórean settlers of Gondor, intended to resemble an Elvish tongue (but wrongly mixing Quenya ar- "beside" with Sindarin nen "water"). Other historians derived Arnen from an unattested pre-Númenórean word arn- ("rock"), although this was based on pure guessing.
- J.R.R. Tolkien, "The Rivers and Beacon-hills of Gondor" (edited by Carl F. Hostetter), in Vinyar Tengwar, Number 42, July 2001, p. 17
- J.R.R. Tolkien, "Unfinished index for The Lord of the Rings", in Wayne G. Hammond and Christina Scull (eds), The Lord of the Rings: A Reader's Companion, p. 512
- J.R.R. Tolkien, The Lord of the Rings, Appendix A, "The Númenorean Kings", "Gondor and the Heirs of Anárion", "The Stewards"
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "The Steward and the King"