Too bad, [name_u]Rhys[/name_u] is lovely! [name_f]My[/name_f] vote is for [name_u]Quinn[/name_u]. I don’t mind it at all on girls, but it’s so handsome and sharp on a boy 
I really love [name_m]Jack[/name_m]
Quinn is all girl in my area.
I do love [name_m]Jack[/name_m] but agree it’s popular if that bothers you.
What about [name_u]Reid[/name_u]/Reed as an alternative to [name_u]Rhys[/name_u]? Similar sound but stronger name imo.
The no-vowel thing in [name_u]Rhys[/name_u] spelling always kind of bugs me too.
Other one syllable names:
[name_u]Drew[/name_u]
[name_u]Miles[/name_u]
[name_m]Cole[/name_m]
[name_m]Ace[/name_m]
[name_u]Dean[/name_u]
Good luck