Region of western Doriath translated “West March” (S/122).

Conceptual Development: In Silmarillion drafts from the 1930s, this name first appeared as Ilk. Nivrim “West-march” (LR/261), and in The Etymologies was designated a Doriathrin [Ilkorin] name, a combination of Ilk. nivon “west” and Ilk. rîm “border” (Ety/NIB, RĪ). Unlike Ilk. Nivrost “West Vale” >> S. Nevrast “Hither Shore”, the name Nivrim was not updated in Silmarillion revisions from the 1950s-60s, even though its earlier etymology no longer fit Sindarin.