[Findegil]

Okay, in this post I will give the entrances concerned with Galadriel, Celeborn, Celebrimbor, Eregion and Lorien from Words, Phrases and Passages. Since it was written about 1960, I will give it the reference:

Hh) Parma Eldalamberon XVII, Words, Phrases and Passages in The Lord of the Rings:

...
S Celebrimbor, S. name of a famous craftsman, the Lord of the Elves of Eregion; he was the ruler of the Elvish realm at the time of the forging of the Rings: se App. B, III p. 364. Celebrimbor is < Celebrin-baur "silcer-fist": celebrin, adl. from celeb "silver" (not implying "made of silver" but "like silver" in hue or worth); paur, fist < kwārē [√KWĂR-, squeeze, clench] = Q quáre 'fist'. The Quenya equivalent was Telpinquar, or Telperinquar.
[among >> the Lord of; probably also the ruler >> the ruler]
...
...
...
S ...
Lothlórien, name of uncertain origin. Lórien was the name of the "gardens" and dwellingplace of the Vala Irmo (Vala of "Desire", in Elvish sense, and Master of Dreams and Visions). This would very well fit the land of Galadriel where a desirable or might-be (or might-have-been) situation was maintained. So Galadriel (who came from Valinor and whose native language was Quenya) may have interpreted it. And this is more or less how Treebeard took it - II 70, where he renders Lothlórien by 'Dreamflower'. But it may be noted that Loth is S. for 'flower', but Lórien in sense of 'dream/ing' cannot be Sindarin. Also Lothlórien was famous for its golden flowers, and by the Rohirrim called the "Goldenwood" as well as Dwimordene (Vale of Phantoms). (Also by Legolas, I 352.) That Treebeard says it was earlier called Laurelindórinan "Valley of Singing Gold". Also it existed long before Galadriel's coming there - it was originally ruled by Nandorin princes, and Galadriel and Celeborn only retreated thither after the downfall of Eregion.
The Nandor name appears to have been Lóriand or Lórinand, containing lór- = Q laure, S glawar. (The Nandor here evidently had a Noldorin ingredient.) That being an alteration , after the introduction of the mellyrn by Galadriel,* of Lindóri(n)and "Vale of Land of the Singers." So Lóri(n)and was deliberately later equated with Q Lórien, but was Sindarized by prefixion of Loth-. The pure Sindarin would have been Lothlewerian(d), or ~ien(d) plural. Or if reference was the "Dream/Vision" Lothlýrian / ~lúrien.
For similar case of interpretation, see Galadriel.
* They came as a gift from Gil-galad, who had the seed from Eressea (by way of Númenor).
[original N. name >> Nandor name; Lórinand >> Lóriand or Lórinand. Cf. EQS loth 'flower'; UT 253; QL Lôrien 'King of Dreams'; GL lothli 'floret'; Etym. LOS- 'sleep', Lórien, LOT(H) 'flower', N lhoth 'flower'; Lothlórien, TI 167, 220; MR 145; WJ 403.]
...
...
...
S yrch, Orcs. ...
...
...
...
This[ the fact that the Silvian Elves spoke Sindarin] is explained by the fact that when Beleriand was ruined, and most of it was destroyed in the last war ending in the overthrow of Angband, many of the Noldor and Sindar went eastward into Eriador and beyond. (Galadriel and Celeborn were the chief examples; but originally the settlement at Eregion under Celebrimbor was also very important.) Being Elves of much greater power and knowledge they usually became rulers of the Elvish companies that they gathered about them; and even when the ordinary speech of these groups was kept up their nomenclature became largely Sindarin. Many of these "wandering elves" in Eriador appear also to have been not stricly Avari but or Telerin origin: and so, if long separated, still ultimately closely akin to the Sindar: their tongues were not, therefore, alien basiclally, but of Eldarin sort, and were much assimilated to Sindarin.
...
...
...
Q Sindarin (Grey-elven) isproperly the name of the language of the Elvish inahbitants of Beleriand, the later almost drowned land west of the Blue Mountains. Quenya was the language of the Exiled High-Elves returning to Middle-earth. The Exiles, being relatively few in number, eventueally adopted a form of Sindarin: a sothern dialect (of which the purest and most archaic variety was used in Doriath ruled by Thingol). This they used in daily speech, and even adapted their own personal names ti its form. But the Sindarin of the High-elves was (naturally) somewhat affected by Quenya, and contained some Quenya elements. Sindarin is also loosely applied to the related languages of the Elves of the same origin as the 'Grey Elves' of Beleriand, who lived in Eriador and further East. [The language in Lórien, though Frodo found it hard to understand, was actually, except in a few names of persons and places, simply Sindarin of Beleriand, brought in by Galadriel and Celeborn, and their followers, who after the destruction of Eregion passed through Moria and established their realm on the east side of ...
...

Respectfuly
Findegil