22nd ruling steward of Gondor (LotR/1039), apparently of a combination of thoron “eagle” and dîr “man”.
Sindarin
thoron
noun. eagle
thoron
noun. eagle
thorn
noun. eagle
thorondir
masculine name. *Eagle-man
thorondor
masculine name. King of Eagles
The King of the Eagles (S/110), his name is a combination of thoron “eagle” and the suffix -dor “king” (SA/thoron, Let/427).
Conceptual Development: In the earliest Lost Tales, this character was named Thorndor “King of Eagles” (LT2/192), a form that also appeared in Silmarillion drafts from the 1930s (SM/34, 102; LR/126). The form Thorondor first appeared as a late change in the Lays of Beleriand from the 1920s (LB/292), and this new form gradually supplanted the old one in the Silmarillion drafts (LR/145, 256). N. Thorondor was the only form to appear in The Etymologies, where it was translated “King of Eagles” and given the derivation described above (Ety/THOR).
thorongil
proper name. Eagle of the Star
Thorondor
noun. eagle lord
thoron (“eagle”) + taur (“king”)
Thorongil
noun. eagle of star
thoron (“eagle”) + gîl (“star, bright spark”)
thoronhîn
proper name. Eorlingas
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Thoron-hîn
name. Eorlingas
thoronath
noun. eagles
thoron
eagle
thoron, pl. theryn, coll. pl. thoronath. The sg. may also appear as thôr (with stem thoron-); thôr is also an adjective ”swooping, leaping down”. In ”Noldorin”, the pl. was therein (LR:392 s.v. THOR).
thoron
eagle
pl. theryn, coll. pl. thoronath. The sg. may also appear as thôr (with stem thoron-); thôr is also an adjective ”swooping, leaping down”. In ”Noldorin”, the pl. was therein (LR:392 s.v. THOR).
thôr
noun. eagle
roval
great wing
(pinion, wing), pl. rovail (idh rovail). – Suggested Sindarin form of ”Noldorin” *rhoval* pl. *rhovel*.
The Sindarin word for “eagle”, derived from ✶thorono (Let/427).
Possible Etymology: The form of this word is difficult to explain. Since final nasals vanished after vowels, in the ordinary phonetic development of Sindarin it should have become thôr, a form that did appear as variant in the Etymologies (Ety/THOR, KIRIS). Tolkien himself suggested that the (Noldorin) word was a back-formation from the archaic genitive ON. thoronen (Ety/THOR). While this specific genitive form did not survive in (Old) Sindarin, there are plenty of other mechanisms that might result in such a back-formation in Sindarin. For example, David Salo suggested that it could be a back-formation from its plural ✱theryn (GS/291), perhaps also influenced by ancient names where it still appeared, such as Thorondor “King of Eagles”.
Conceptual Development: In the Gnomish Lexicon of the 1910s this word appeared as G. thorn (GL/73), which was also the usual form in names of this period. In Early Noldorin Word-lists of the 1920s it reappeared as ᴱN. thorn (PE13/154), but in The Etymologies of the 1930s it appeared as N. thoron beside the variant thôr as noted above (Ety/THOR, KIRIS). The names of this period also began to reflect this change, and names after the 1940s consistently show thoron, though the form þorn did appear at least once in later notes (PE22/159).