The Quenya name of Thorondor, a compound of the prefixal form soron- of soron “eagle” and the word element -tar “king” used in compounds (SA/thoron; Ety/TĀ, THOR).
Conceptual Development: In the earliest Lost Tales, this character’s name once appeared as ᴱQ. Ramandur (LT2/203) but in this instance it was replaced by ᴱQ. Sorontur “King of Eagles”, which was his usual Qenya name in the early stories (LT1/73, LT2/192). His name appeared in The Etymologies from the 1930s as ᴹQ. Sorontar “King of Eagles”, and these entries are the source for the etymology given above (Ety/TĀ, THOR). This name appeared in Silmarillion revisions and notes from the 1950s (MR/410, WJ/272) and also in The Silmarillion appendix (SA/thoron), but Christopher Tolkien did not include it in the main text of the published version of The Silmarillion.
Sorontar (þ) masc. name "King of Eagles", Sindarin Thorondor, name of a great Eagle (SA:thoron, THOR/THORON, TĀ/TA3)