arn

adjective. royal

arnen

adjective. (?) royal

Originally, Lonnath-Ernin might have been intended to mean 'royal havens', assuming the second element to be a regular adjective. However, the second element in Emyn Arnen 'hills of Arnen' is singular, and Tolkien later decided that it should mean 'Hill beside the water', see VT/42:17 and HL/119-124. Nevertheless, this meaning cannot apply to Lonnath-Ernin (havens are near water by definition), so unless we entirely reject this earlier form, we may assume that an adjective 'royal' is still possible.

ar

royal

(adj. prefix) ar- (noble, high). In the form ar(a)- this is an element in the names of the kings of Arnor and Arthedain.

ar

royal

(noble, high). In the form ar(a)- this is an element in the names of the kings of Arnor and Arthedain.

arn

royal

arn (noble), pl. ern

arn

royal

(noble), pl. ern