they do feel a bit same-y to me (though I guess you could say [name_m]Yoan[/name_m] comes from Yoḥanan[name_f][/name_f] and [name_m]Jonny[/name_m] comes from Yehonaṯan[name_f][/name_f] so they can have slightly different origins), but I also have known someone who has three different forms of [name_m]William[/name_m] as their name and a lot of people didn’t even notice 
[name_f][/name_f] so if [name_m]Yoan[/name_m] [name_m]Jonny[/name_m] works for you I guess it could work!)
Maybe…
[name_f][/name_f][name_m]Joel[/name_m]
[name_f][/name_f][name_m]Yoel[/name_m]
[name_f][/name_f][name_m]Jonas[/name_m]
[name_f][/name_f][name_m]Joah[/name_m]
[name_f][/name_f][name_m]Jordan[/name_m]
[name_f][/name_f][name_m]Joniel[/name_m] / Yoniel
[name_f][/name_f][name_m]Jason[/name_m]
[name_f][/name_f][name_m]Ivan[/name_m]
[name_f][/name_f]Javo
[name_f][/name_f][name_m]Javier[/name_m]
[name_f][/name_f][name_m]Javiero[/name_m]
[name_f][/name_f]Josan