[name_f]Do[/name_f] you have the parents, siblings, upper class friends names yet? What country does the story take place in or what earth kingdoms do you want to draw from?
No offense, but none of your names sound very royal to me. Might this prince be the heir to a musical empire instead of an actual ruler? [name_m]Just[/name_m] throwing out ideas…
You don’t have any classic [name_f]English[/name_f] style names listed so I can only assume you arent too fond of them.
[name_m]Cash[/name_m] could be short for [name_m]Cassius[/name_m], [name_m]Caspian[/name_m] (this might work better if he is not a literal prince) or a stretch for [name_m]Sebastian[/name_m] (though Bash is easier)
[name_u]Augustine[/name_u] or Augustos (August can be a nickname)