There seems to be significant confusion over the proper pronunciation of Mitheithel (as in, the upcoming zone, Angle of Mitheithel).
One thing that is clear is that the "eithel" part of the name is from the Sindarin for spring, well, or some other water source.
https://tolkienlanguages.fandom.com/wiki/Sindarin has a generic pronunciation guide, under which the diphthong "ei" is pronounced like the vowel sound in "day". So, eithel would be something like "ay-th-ehl".
https://www.elfdict.com/w/eithel/s gives the IPA (International Phonetic Alphabet) for eithel as ei?el, whereas
https://www.jrrvf.com/hisweloke/sindar gives ?j??l.
There is an online IPA pronouncer app at
http://ipa-reader.xyz/, with several different speakers from which to choose. The two different inputs -- ei?el and ?j??l -- give strikingly different results: ei?el has two vowel sounds before the consonant, whereas ?j??l only one.
In any case, can someone at SSG and/or who knows Sindarin pronunciation, clarify? Since we're going to be saying this name a lot in the near future, it would help to know how to do so correctly.
Or, just call it by its Race of Man name -- Hoarwell -- since I don't think anyone would debate that pronunciation.
EDIT: The special IPA characters appear to have not come through. One would have to consult the sources linked above. Sorry, they were there in the preview...