Personally, yes. It’s too close for me.
Some suggestions:
[name_f]Liana[/name_f] & [name_f]Tilly[/name_f]
[name_f]Liana[/name_f] & [name_f]Millie[/name_f]
[name_f]Liana[/name_f] & [name_f]Alisa[/name_f]
[name_f]Liana[/name_f] & [name_f]Mei[/name_f]
[name_f]Liana[/name_f] & [name_f]April[/name_f]
[name_f]Liana[/name_f] & [name_f]Melody[/name_f]
If you want the same initial:
[name_f]Liana[/name_f] & [name_f]Lottie[/name_f]