Of course anyone who reads the books is welcome to "hear" the names any way they want to. But if you want to know how they sound to me, below is a guide.
I tried to keep them as phonetic as possible, as phonetic spelling is the norm in that world, but they have different alphabets, including letters for double vowels and some other sounds not common in English. An exception would be the 'c' next to 'z' which I've been messing with—the sounds closest are z plus ts, but I don't like the way Vorztsin looks for a name, so I've kept it as Vorzcin. There's also a problem with the Sartoran Ya, which is a forceful sound—often with a silent h up front—we don't have it in English…I keep messing about with various ways of spelling it, and have never come up with the ideal fix because of the way 'y' sounds wiggle about in spoken English.
General note—all vowels are pronounced, including final 'e' which is usually an 'eh' sound in most of the eastern countries, and 'ee' in the west of the southern continent. The 'a' is never the flat 'a' as in the American 'cat' but, almost always the sound is closer to the 'o' as in 'hot'—I spell it ah below.
Chelis—CHELL-iss [the 'ch' as in 'cheese']
Choraed Elgaer—Khoh-RAY-ed Ell-GAY-air
Darchelde—Dahr-CHELL-deh [ch as in cheese]
Dyalen—DYAH [as in Ya-ha-ha!]-lenn
Edli—ED-lih (the i in 'sit' with an 'h' sound at the end)
Fareas—Fah-RAY-us (the Sartoran pronunciation would be FAH-reh-us)
Ghael—[say 'hail' with a g on the front]
Hesea—Hess-AY-[as in 'stay']-ah
Inda—IN-dah ('in' as in 'in and out', not EYE-N-dah)
Indevan Algara-Vayir—IN-deh-vahn Al-GAH-rah-Vay-EER
Iofre—YOH-freh [that's the 'yo' as in 'yo ho ho', no 'eye' sound]
Kethedrend—KETH (as in Beth)-eh-drend
Manther—MON-[as in on]-thair
Montredavan—An—MAHN-tray-dah-van-On [the v is almost an f, and will vanish]
Montrei-Hauc—Mon [as in 'on']-TRAY-ee HAH-uck
Montrei-Vayir—Mon[as in 'on']-TRAY-ee-vay-EER
Savarend—Sah-VAR [as in 'far']-end, Sartorian pronunciation: SAH-vah-rend
Shendan—SHEND [as in 'end']-on
Tanrid—TON [as in 'on']-rid
Tdor—t'dor—no vowel sound between the consonants
Vedrid—VEHD [same sound as in 'said']-rid
Chwahir—the 'ch' is a back-of-throat-cough-WAH-hurr
Jeje—Jeh-jeh [though in the east it sounds more like Jay-jay]
Sarias—Sah [saw]REE-ahs, or Sartoran, SAR-Yas, a distinct 'YA!' sound for the 'I'
Tau—Sartoran pronunciation TAH-oo, most just say Taw as in 'jaw'