Of your current options, I love:
[name_f][/name_f][name_f]Delphine[/name_f] → sleek, pretty and floral, grounded yet stand out
[name_f][/name_f][name_f]Celestine[/name_f] → magical and elegant, celestial and pretty
[name_f][/name_f][name_f]Romilly[/name_f] → melodic and stylish, with such lovely nicknames (Ro, [name_f]Romy[/name_f], [name_f]Milly[/name_f], [name_m]Rome[/name_m], Mimi)
[name_f][/name_f][name_f]Tierney[/name_f] → unexpected and rugged but with a touch of magic and intrigue
[name_f][/name_f]I like [name_f]Ianthe[/name_f] (but [name_f]Ianthe[/name_f] / [name_f]Evadne[/name_f] are a bit rhymey for me). [name_f][/name_f] [name_f]Celestine[/name_f] [name_f]Ianthe[/name_f] or [name_f]Delphine[/name_f] [name_f]Ianthe[/name_f] would be nice though!
[name_f][/name_f]I do want to also short out [name_f]Thessaly[/name_f] [name_f][/name_f]- if it helps, at all, I used the name in a story I submitted for a class at uni and people guessed and read it correctly? I also think it’s a stunning choice 