I really like either [name_u]Rhys[/name_u] or [name_u]Reece[/name_u]! I’m not sure where you are; in the U.S. at least, I suspect you might have a few pronunciation issues with [name_u]Rhys[/name_u], but nothing that would stop me from using that spelling. I like [name_u]Reece[/name_u] equally though, if you’re very concerned about that. [name_u]Reese[/name_u] would be my third choice. I find [name_m]Reis[/name_m] more confusing than [name_u]Rhys[/name_u], and [name_u]Rees[/name_u] just looks a little bit incomplete to me personally (very subjective of course!).