as @/marysia said, [name_m]Yoan[/name_m] and [name_m]Jonny[/name_m] both derive from the same name, but if that doesn’t bother you, i’m not sure too many people would notice! especially since they look very different, and if [name_m]Jonny[/name_m] is the middle name and won’t be used very often
[name_f][/name_f]some other options… (i’m afraid i don’t know much about Spanish names, or [name_f]English[/name_f] names that work in Spanish, but i hope some of these spark some inspiration!)
[name_f][/name_f][name_m]Jacobo[/name_m]
[name_f][/name_f]Jeremías
[name_f][/name_f][name_m]Joaquin[/name_m]
[name_f][/name_f][name_m]Joel[/name_m]
[name_f][/name_f]Jonás
[name_f][/name_f][name_m]Jonatan[/name_m] (close to [name_m]Jonny[/name_m] but not related to John)
[name_f][/name_f]Jordán
[name_f][/name_f][name_m]Jorge[/name_m]
[name_f][/name_f][name_m]José[/name_m]
[name_f][/name_f]Josué
[name_f][/name_f][name_m]Juan[/name_m] (another form of [name_m]John[/name_m] though)
[name_f][/name_f][name_m]Julián[/name_m]
[name_f][/name_f][name_m]Julio[/name_m]
but i think you should ultimately go with what you like / what feels like you! 