In LotR/IV:IV, Frodo is called Daur, which might be the mutated form of this word
Noldorin
ar-
prefix. day
ar-
prefix. outside, beside; without
ar-
prefix. etym. beside
ar-
prefix. without
ar
conjunction. and
arthoren
place name. Fenced Realm
a
conjunction. and
ar(a)-
prefix. noble, royal
aran
noun. king (used of a lord or king of a specified region)
athan
preposition. beyond
aur
noun. day, sunlight, morning
dae
adverb. very
gloriel
adjective. golden
penninar
noun. last day of the year
taur
noun. king (only used of the legitimate kings of whole tribes)
âr
noun. king (used of a lord or king of a specified region)
âr
noun. king
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)).