Sindarin 

gil

noun. star, (bright) spark, silver glint, twinkle of light
Sindarin [Let/427; LotR/1113; MR/388; MR/470; MR/471; PE17/022; PE17/023; PE17/030; PE17/050; PE17/152; PE22/159; RC/232; RGEO/61; RGEO/65; S/106; SA/gil; VT42/11] Group: Eldamo. Published by

gil

noun. gil

n. -.

Sindarin [(PE17 Sindarin Corpus) PE17:23] < _g)illĕ_/_g)illē_ < ÑGIL. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

gil

noun. star, bright spark

In The Etymologies (Ety/358, corrected by VT/45:15), this word was given as geil , plural gîl. However, later in LotR/E and RGEO/73, Tolkien seems to consider gil as a singular (with no hints in the sources of what the plural would be, besides the collective plural giliath )

Sindarin [LotR/E, S/431, RGEO/73] Group: Hiswelókë's Sindarin Dictionary. Published by

gil-

noun. star
Sindarin [PE 22:159] Group: Mellonath Daeron. Published by

gill

noun. star
Sindarin Group: Eldamo. Published by

giliath

noun. all the host of stars
Sindarin [Ety/358, RC/232] Group: Hiswelókë's Sindarin Dictionary. Published by

el

star

n. star.

Sindarin [(PE17 Sindarin Corpus) PE17:55] -. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

elen

noun. star
Sindarin Group: Eldamo. Published by

elen

star

pl1. elin, pl2. elenath _n._star. Its collective plural (pl2.) designates 'the (host of all the) stars, (all) the (visible) stars of the firmament'. Q. elen, pl1. eldi, eleni. o menel aglar elenath ! lit. 'from Firmament glory of the stars !'. >> êl

Sindarin [(PE17 Sindarin Corpus) PE17:20-1:24-5:67:139:151] < EL star. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

êl

noun. star
Sindarin [Let/281; LotR/0238; MR/373; PE17/022; PE17/024; PE17/025; PE17/055; PE17/067; PE17/127; PE17/139; PE17/151; PE22/150; PM/369; RGEO/63; RGEO/64; RGEO/65; RGEO/67; SA/êl; WJ/363] Group: Eldamo. Published by

êl

star

pl1. elin, pl2. elenath** ** n. star. Q. elen, pl1. eldi, eleni, pl2. elelli. >> elen

Sindarin [(PE17 Sindarin Corpus) PE17:24:67:127:139-40:151] < EL star. Group: Parma Eldalamberon 17 Sindarin Corpus. Published by

êl

noun. star (little used except in verses)
Sindarin [WJ/363, MR/373, RGEO/73, Letters/281] Group: Hiswelókë's Sindarin Dictionary. Published by

* Ilwen

gil

_ (LR:358) and would then have the form Ilwen (Ilwith) when lenited. But in a later source, Tolkien cited the relevant root as _Ñ

* Ilwen

gil

_ (LR:358), and the lenited forms would thus be Ilwen, Ilwith. But in a later source, Tolkien cited the relevant root as _Ñ

* Ngilwen

gil

_ (MR:388) and the lenited form would then be Ngilwen (Ngilwith). (In the Etymologies, the root was given as GIL, and the lenited form would then be Ilwen / Ilwith.)

* Ngilwen

gil

_ (MR:388), and the lenited form would then be Ngilwen (Ngilwith).

* Ngilwen

gil

_ (MR:388), and the lenited form would then be Ngilwen (Ngilwith).

* gîl

star

gîl (i ngîl = i ñîl, o n**gîl, construct gil) (bright spark, silver glint), no distinct pl. form except with article (in gîl = i ñgîl), coll. pl. giliath** (RGEO, MR:388). Poetic †êl (elen-, pl. elin, coll. pl. elenath) (RGEO, Letters:281, WJ:363).