Earliest (and immediately rejected) name of Emyn Muil in Lord of the Rings drafts from the 1940s, glossed “Border Hills” (TI/268). Its seems to be a combination of the plural of dôl “hill” and rhain “border”.
Noldorin
emyn arnen
place name. Emyn Arnen
emyn rhain
place name. Border Hills
duil rain
place name. Border Hills
amon
noun. hill
amon
noun. hill, steep-sided mount
mindon
noun. isolated hill, especially a hill with a watch tower
mindon
noun. tower
tund
noun. hill, mound
tunn
noun. hill, mound
Earlier name of Emyn Muil in Lord of the Rings drafts from the 1940s, glossed “Border Hills” (TI/313), also appearing as Emyn Rain (TI/268). Its seems to be a combination of the plural of amon “hill” and rhain “border”.