Lewa: "LAY-wah" or "Leh-vah"
(the second one is if you count w as a v (to some both letters are the same, its how you say the letter "v", the lip and teeth movement, that makes it a "w"), because their pronunciations are almost the same and the eh and ay are just another way to accent the letter "e"( its ether a more monotone "e" or a more higher note "e")
Reasons are because the Maoir words use phonemic orthography and it takes one that uses it to notice it.
You have spelling of a word, we just say it and its spelling is how we say it. Each letter has its distinct sound.