I always try to keep in mind that the etymology of any particular word can completely change it's probable pronunciation. For instance, if the word "deku" originated in French, it's most credible pronunciation would be rather different than if it was rooted in German. Now I know that some people say things like "well we know that all these words are rooted in Japanese", but that isn't quite true. The Japanese will quite often derive words, names and pronunciations from English (which in turn draws influence from many other languages) simply because it sounds or looks cool, therefore making the "all proper Zelda names are Japanese" statement a very poor rule of thumb. An age-old example of this phenomenon would be the Dragonball character, Bulma. Her name is not initially recognizable as an English word, but it's actually a reference to the Japanese pronunciation of "bloomers", which is buruma.
okay so we've got
Gerudo- guh-roo-doh
Farore- fuh-roar-uh
Nayru- I always pronounced it as nigh-roo, though I think it should actually be pronounced neigh-roo
Rauru- Roar-oo
Sahasrahla- Suh-hah-sruh-lah
Deku- day-koo
These last three, I'm pretty firmly convinced that my proposed pronunciation is correct, when taking basic phonetic rules into account.
Malon- rhymes with talon, like on a birdy's feet.
Epona- ee-pown-uh. I've heard people pronounce it with a short e sound, but if that were the case it would be spelled Eppona. This is a case of willful overcomplication.
Kakariko- I've heard a good few people pronounce this name so that the first "kak" is made to rhyme with "rack" and the accented syllable is "ri", which is made to rhyme with "rick". If it were indeed pronounced as kack-uh-'rick-oh, then it would be spelled Kakkarikko. However, spelled as it is, the most phonetically accurate pronunciation is kuh-'care-i-koh, with the accent on the second syllable and the i sounded short. I understand proper names (especially in fiction) don't always rely on concrete phonetics, but some are a bit more straight-forward, and I believe Kakariko is one of them.
My new year's resolution: stop turning everything into an essay.