I've always pronounced it Rhis-sand, I don't know why. It just felt more natural on my tongue, like Rh-is-sand. Reese-and also sounds a bit forced to me. And also @RebelleStar I think that your post is a bit disrespectful to all the Rise-sand people out there, and conversely, why would a big scary high lord be called Reese, like Reese's peanut butter cups?