I don’t usually love repeat letters but I think [name_f]Leonor[/name_f] or [name_f]Leonora[/name_f] would be wonderful especially (but not only) if this is your final baby to “tie up set” (obviously talking just about names!). But [name_f]Eleanora[/name_f] is very feminine & pretty with [name_f]Serena[/name_f] and takes the set on a more frontier & flowy direction. And [name_f]Nora[/name_f] does match [name_m]Liam[/name_m] nicely, and makes for a crisper set. Maybe a teeny bit clashy with [name_f]Serena[/name_f] but only a teeny bit. Visually look great. Tricky choice but good to know all work!
Some other ideas:
[name_f]Honora[/name_f] (vintage and gorgeous- - and gives nn [name_f]Nora[/name_f] but also [name_f]Honey[/name_f])
[name_f]Lenora[/name_f] (more streamlined and gentle, like [name_f]Serena[/name_f], still gives [name_f]Nora[/name_f] - or [name_f]Leni[/name_f], I like this visually better than [name_f]Eleanora[/name_f])
[name_f]Eleanor[/name_f] (means she has her own ending of her name, and you can still use [name_f]Nora[/name_f], [name_f]Ellie[/name_f] or [name_f]Leni[/name_f] etc)
[name_f]New[/name_f] ideas if still helpful: [name_f]Juliet[/name_f], [name_f]Jessamine[/name_f], [name_f]Audrey[/name_f], [name_f]Violet[/name_f], [name_f]Autumn[/name_f], [name_f]Elodie[/name_f], [name_f]Clara[/name_f], [name_f]Fleur[/name_f], [name_f]Flora[/name_f], [name_f]Tallulah[/name_f], [name_f]Daisy[/name_f], [name_f]Hazel[/name_f], [name_f]Martha[/name_f], [name_f]Mary[/name_f] or [name_f]Elsbeth[/name_f].