S. Arthórien loc. “Hidden Realm”
A region between the rivers Aros and Celon, so labeled in the Silmarillion map from the 1950s but not in the published Silmarillion (WJ/183). It is also mentioned in Tolkien’s unfinished expansion of the Tale of the Children of Húrin (UT/77). A late isolated note indicates that Arthúrien (with a ú) was a name used by the Noldor, which was derived from the proper Sindarin form Garthúrian (WJ/189). The name is clearly not Quenya, so perhaps it is Noldorized Sindarin, dropping the initial g.
Conceptual Development: In The Etymologies from the 1930s, N. Arthoren is said to be a translation of Ilk. Garthurian, beside the “half translation” Arthurien (Ety/GAT(H), ƷAR, THUR), matching the later modification of Sindarin Garthúrian into Arthúrien/Arthórien.
References ✧ UTI; WJ/189; WJI
N. Arthoren loc. “Fenced Realm”
A Noldorin translation of Ilk. Garthurian “Fenced Realm, Hidden Realm” appearing in The Etymologies from the 1930s along with numerous variations (Ety/ƷAR|GARAT, THUR). It seems to be a combination of ardh “realm” and thoren “fenced”, as indicated by the variant forms Ardh-thoren or Ar(ð)thoren. A third variation, Arthurien is said to be a half translation or Noldorization of Ilk. Garthurian. A fourth variation, Ardholen seems to have a different meaning: “Hidden Realm” (Ety/GAT(H)).
See S. Arthórien for further discussion.
References ✧ Ety/ƷAR|GARAT, THUR; EtyAC/ƷARA
|ardh||“realm”||✧ Ety/ƷAR; EtyAC/ƷARA (ardh)|
|ᴹ√THUR||“surround, fence, ward, hedge in, secrete”||✧ Ety/ƷAR|GARAT; Ety/ƷAR|GARAT|
|ᴹ√ƷAR||“have, hold”||✧ Ety/THUR|