My taste run more akin to yours but I’ll try to balance and also match big sis’ vibe!
Maybe:
[name_f]Thisbe[/name_f] & [name_m]Julian[/name_m]
[name_f]Ianthe[/name_f] & [name_m]Remus[/name_m]
[name_f]Viola[/name_f] & [name_m]Oswin[/name_m]
[name_f]Ivette[/name_f] & [name_m]Ansel[/name_m]
[name_f]Odelyn[/name_f] & [name_m]Roland[/name_m]
[name_f]Rasine[/name_f] & [name_m]Alaric[/name_m]
Hopefully these help! 