It’s too bad he didn’t like [name_f]Gwendolyn[/name_f] - I love that name! Here are few more ideas (sorry if any are repeated!). Maybe using a “[name_u]Lynn[/name_u]” name in the middle would loosen up some of the restrictions? Like maybe [name_f]Madelyn[/name_f] would be okay in the middle, since you know an [name_f]Adelynne[/name_f] already.
Callyn/[name_m]Callen[/name_m]
[name_f]Alyna[/name_f]
[name_f]Arlynn[/name_f]
Alinnea
[name_f]Marlena[/name_f]
[name_f]Lena[/name_f]