I like
Jasper and I like
Louis, but
Louie looks child like and dog like to me. I'd use
Louis pronounced Loo-ee. It really annoys me when people pronounce
Louis like
Lewis though, so maybe
Louie is safer but it just looks so young
anyway that aside, I adore
Emrys :)
I think I'd go with
Jasper Rhys and
Louis Emrys or
Jasper Gawain and
Louis Emrys - though that may be too Arthurian Legend for some