I actually did record some pronounciation videos for my own setting Trachoria. However, I've always maintained that there is no one correct way to pronounce names in the setting since there are (which goes for Ravenland as well) numerous languages and dialects around (so andarp stands uncorrected
). Obviously I have one pronounciation of each name in my own mind, but I wouldn't consider it the only or necessarily correct one.
For the names you specifically mention, I personally in English would say:
Stanengist – Shtánengist (S lisping and á like in bar)
Merigall – Mérriegull (like merrie + gull, duh)
Zytera – Tsytéera (ée like in Bagheera or leer (UK version), not like in feel)
Zertorme – Tsertórmeh (pronouncing the ending e like in meh)
Hopefully this was to some help, but again, find your own way.