Sindarin 

eglahir

place name. Elf-river

A name for a river in Beleriand, replacing earlier Ilk. Eldor/Eglor (SM/227) and replaced in turn by the name S. Nenning (WJ/117). It appears to be a combination of the prefixal form Egla- of Eglan “Forsaken (Elf)” and the lenited form -hir of sîr “river” also appearing in names such as Linhir and Nanduhirion.

Sindarin [SM/227.3403; SMI/Eglahir.001; WJ/117.3407; WJI/Eglahir.001] Group: Eldamo. Published by