[name_f]Lua[/name_f] feels Brazilian and modern, short and sweet. Some boys names that feel similar to me:
[name_m]Caio[/name_m]
[name_m]Rafa[/name_m]
[name_m]Tiago[/name_m]
[name_m]Renan[/name_m]
[name_m]Davi[/name_m]
I think my favorites with [name_f]Lua[/name_f] are [name_m]Caio[/name_m] and either [name_m]Rafa[/name_m] or Renan… I think I’m going [name_f]Lua[/name_f], [name_m]Caio[/name_m], and [name_m]Renan[/name_m], but I like [name_m]Rafa[/name_m] nearly as much. I do like how [name_f]Lua[/name_f], [name_m]Caio[/name_m], and [name_m]Renan[/name_m] all have different endings though.
Good luck!