[Elvellon]

>GLOR-SL-01 <Glorfindel II GLOR-SL-02c{This name is in fact derived from the earliest work on the mythology: The Fall of Gondolin, composed in 1916-17, in which the Elvish language that ultimately became that of the type called Sindarin was in a primitive and unorganized form, and its relation with the High-elven type (itself very primitive) was still haphazard. It was intended to mean}Glorfindel means ‘Golden-tressed’, GLOR-SL-03{(4)} and was the name given to the heroic {‘Gnome’ (}Ñoldo{)}, a chieftain of Gondolin, who in the pass of {Cristhorn}[Cirith Thoronath] (‘Eagle-cleft’) fought with a {Balrog [> }Demon{]}, whom he slew at the cost of his own life. GLOR-SL-04{
Its use in The Lord of the Rings is one of the cases of the somewhat random use of the names found in the older legends, now referred to as The Silmarillion, which escaped reconsideration in the final published form of The Lord of the Rings. This is unfortunate, since the name is now difficult to fit into Sindarin, and cannot possibly be Quenyarin. Also in the now organized mythology, difficulty is presented by the things recorded of Glorfindel in The Lord of the Rings, if Glorfindel of Gondolin is supposed to be the same person as Glorfindel of Rivendell.
As for the former: he} He was slain in the Fall of Gondolin at the end of the First Age, and GLOR-SL-04.5{if}was a chieftain of that city {must have been}and a Ñoldo, one of the Elf-lords in the host of King Turukáno (Turgon). GLOR-SL-05{; at any rate when The Fall of Gondolin was written he was certainly thought to be so.}

Reading it as plain text, this is repetitive:

Glorfindel means ‘Golden-tressed’, and was the name given to the heroic Ñoldo, a chieftain of Gondolin, who in the pass of Cirith Thoronath (‘Eagle-cleft’) fought with a Demon, whom he slew at the cost of his own life.

He was slain in the Fall of Gondolin at the end of the First Age, and was a chieftain of that city and a Ñoldo, one of the Elf-lords in the host of King Turukáno (Turgon).