This name is shared by many Latino singers--too many to list here, in fact. One of my favorite recording artists, Latino or otherwise, happens to be Luis Fonsi.
Luis de Pointe du Lac from Anne Rice's vampire chronicles.
-- Anonymous User 9/3/2006
The LWEES pronunciation is usually too much for most English speakers to handle. It ends up sounding like the feminine name Louise. Thus, I almost always go by the English pronunciation for Louis.