The Sindarin name of Oromë (LotR/1039), a derivation of his Valarin name Arǭmēz (WJ/400).
Possible Etymology: Tolkien considered several different derivations of this name. In The Etymologies of the 1930s and in some later writings, the name was derived from primitive ᴹ✶Orǭmē (Ety/ORÓM; PE17/99, 153), but in these derivations it is unclear how the initial element of his Sindarin name developed from O into A.
Later, Tolkien decided that his name developed from Val. Arǭmēz (PE17/138, WJ/400), making the initial A in the Sindarin name easier to explain. In the case of his Quenya name, the initial A changed to O by association with the Quenya root √ROM “noise of horns” (WJ/400).
Conceptual Development: In the Gnomish Lexicon from the 1910s, the cognate of Orome was given as G. Orma (GL/63). In the Lays of Beleriand from the 1920s, it appeared as G. Ormain >> Ormaid, both rejected and replaced by (unrelated) Tavros (LB/195).
In The Etymologies from the 1930s, the Noldorin name of Orome appeared first as (rejected) N. Goru (EtyAC/GÓROM), then Araw (Ety/ORÓM). In Lord of the Rings drafts from the 1940s, his name was written as (incomplete and rejected) Ramr... before being immediately changed to Araw (WR/292). This remained his Sindarin name thereafter.
forest dread (Oromë) [Etym. TÁWAR-]; taur (“great wood, forest”) + goss (“dread, fear”); in PM:358, the S name of Oromë is given as (Aran) Tauron “the (king) forester” < aran “king”, taur “great wood, forest” + on (traditional ending for male names)