I feel like Atticus is the new Holden which will likely be overused and should be on the hipster list if it isn't already. I do love the initials RAD (Rio Atticus Dumont) and the AJ (of Ace Joseph). I'm not sure about Koa Thomas (KT? Katie?). Koa sounds more like a girl's name with the final A. I do appreciate him thinking outside of the box.