Translation list.

While aimed specifically at Ufgor, I wouldn't disagree with any other feedback. There's a couple of Quenya and Adunaic names in there; they are labeled. Settle in folks this list is LOOOONG:

Armegil (ar+megil; "Noble Sword")

Maltui (malt+ui; "Ever-gold")

Nenion (nen+ion; "Son of Water")

Gilmith (gil+mith; "Grey Star")

Daniel (Dan+iel; "Daughter of Dan" (another name for Lenwë in some writings))

Aerchir (aer+ hîr; “Sea-lord”)

Herthalion (hîr+thalion; “Dauntless Lord”)

Lithbar (lith+bar; “Lands of Ash”)

Narlad (nar+lad; “Flame Plain”)

Barad Amrûn (“Tower of the Sunrise”)

Ithilond (ithil+lond; “Haven of the Moon”)

Nimlad (nim+imlad; “White Valley”)

Mírimlad (mîr+imlad; glossed as “Treasure Valley” (lit. “Jewel Valley”))

Khazad-duban (“Valley of the Dwarves”, Khuzdul name of Mírimlad.)

Barorod (bar+orod; “Mountain-home”)

Minas Ronduin (“Tower of the Cave River”)

Gaerlinnost (Gaer+lin+ost; “Fortress of Sea-song”)

Sírbarad (sîr+barad; “Tower of the Rivers”)

Nan Istar (“Wizard’s Vale”)

Taur-en-Emyn (“Forest of the hills”)

Mandil (man+ndil; “blessed-devotion”)

Esteloth (estel+loth; “Flower of Hope”) I will not be changing this one even if wrong.

Apaceno (apacen+mo; Q “Man of Foresight”)

Maigol (maidh+coll; glossed as “yellow mantle” (lit. “fallow mantle”)

Seregarn (serge+caran; “Blood-red”)

Aglaroth (aglar+loth; “Radiant Flower”)

Maedír (maed+ndir; “Skilled Man”)

Seregûl (serge+gûl; glossed as “Blood Magic”)

Urinzil (uri+inzil; A “Sun-Flower”)

Ardazôr (Arda+zôr; A “Flame of Arda”)

Cubeleg (cû+beleg; “Great Bow”)

Mirwen (mir+wen; “Jewel-maiden”)

Argloss (ar+gloss; “Noble-white”)

Mormo (mor+mo; “Dark One”)

Thornwen (thorn+wen; “Steadfast Maiden”)

Anormir (anor+mir; “Sun Jewel”)

Ithilros (ithil+ros; “Moon-spray”)

Zimbrabel (zimra+bel; A “Jewel of Light”)

Sakalkhôr (sakal+khôr; A “Lord of Shores”)

Hyarmen Tolli (“South Islands”)

Tol Duáth (“Island of Shadow”)

Amon Ernil (“Hill of the Prince”)

Erineld (“Morning Bell”; TBH I don’t remember how I got this.)

Nimaras (nim+aras; “White Deer”)

Daefindel (dae+findel; “Shadow-haired”)

Valgon (vala+gon; “Powerful Commander”; I'm aware this blends Quenya & Sindarin. Pure Sindarin is likely Balgon.)

Celedan (celeb+tân; "Silversmith")

I caught one wouldn't Argloss > Arloss > Arlos? S59 final [ll], [nn], [ss] shortened in polysyllables. That was a quick one I noticed.

Yes, that would be correct!

One could argue that these reductions can be ignored in some cases, particularly with names, and I don't think we have a clear understanding of the rules for that. For example, we have Elrond, where we would perhaps expect Elronn, and we have Aglarond, where we would expect Aglaron; the same may be true for final -ss as well (or it may not - don't think we have any examples as such).

But yes it is definitely true that Arloss would normally become Arlos, I missed that.

In lieu of Mandil, how about:

Eru+ndur; Servant of Eru? While it works in Quenya, would that even translate into Sindarin? I'm not seeing "(n)dur" in Sindarin.

There is Eruchîn “Children of Eru (God)”. Which loans the word Eru in Quenya. But I think it would Erunnir. < √N(D)ER “male (person), man”. There is also √(N)DUR root. “love, feeling of special concern with, care for, or interest in things” resulting in something like Erunnor. But you should not mix Quenya and Sindarin though. Please note I did not go through all the rules. I just did a quick overview of them.

I know they don't mix, Eru+ndur is Quenya but I was unsure how it'd translate into Sindarin as I couldn't find Sindarin parallel to ndur.

There are no known occurrences of √NDUR in Sindarin, it appears to be a Quenya-exclusive root.

That being said, if you conceive this as a Quenya name Erundur that is later Sindarised, you can have it as Erunnur, or even leave it as it is.

(Not Erunnor, because the suffix is ✶-ndūr - the long ū is not subject to raising into [o].)

It is, indeed, a Vanyarin Elf who came with his Noldor family to Middle-Earth. So a Sindarisation of a Quenya name.