We aren't even certain (
or at least I'm not) that
Legolas was the true name of this character in
The Fall of Gondolin, as opposed to being a later confusion of two names (see below), but anyway, at the time FG was written, this character was a Noldo . . . noting another elven character named
Gimli.
Just in case no one doesn't care, what my former, younger self means here is that if the
Gondolin Elf was really named
Laigolas Legolast ["perhaps" noted in the quote below, but the rest of it at least seems to confirm the point], the confused form Legolas could be . . .
A) the confusion of a later scribe, which could mean that no Elf ever called Laigolas Legolast by the name "Legolas".
Or
B) that the
Elves themselves confused it, and began calling this Elf
Legolas -- thus it became his name (in the same way a nickname becomes a name), and the scribes merely used in to record the histories.
And looking (now!) in
The Book of Lost Tales I Appendix, a note associated with the tale says of this character:
"he liveth still in Tol Eressea named by the Eldar there Laiqalasse"
Okay,
Laiqalasse is a Qenya (early
Quenya) form for "Greenleaf", and mirrors
Laigolas. So it seems that the Elves of Tol Eressea actually called him Laiqalasse, which would seem to indicate that he, or others, actually used/heard/uttered
Laigolas.
Gnomish
leg meant
"keen, piercing" and referred to his sight. And Gnomish
last meant "look, glance", thus Legolast "Keen-sight
So again, did anyone ever call this Elf L
egolas? Into his very ears I mean?
Or is there some reason that makes this question senseless?
note: if it makes no sense, I was only joking
"Note: Laigolas = green-leaf (...) But perhaps both were his names, as the Gnomes delighted to give two similar sounding names of dissimilar meaning, as Laigolas Legolast, Turin Turambar, etc. Legolas the ordinary form is a confusion of the two." JRRT The Book of Lost Tales
Ordinary form?
Fake edit: I suppose it's possible that Laigolas' friends actually used the confused form, but when he ended up in Tol Eressea, he was given the Qenya form of Laigolas, it being more accurate.
So, never mind.