My favourites would be Ines, Cerys and Vivienne, in that order.
If you want something unusual, there are quite a few you might want to discount
Ottolie - it’s Ottilie. It’s having a real moment so I wouldn’t use it if you want something original. It’s also a bit fussy. Leonie? Odessa? Octavia?
Zara - nice. Quite popular. Stella, Flora, Aphra, Astra would be less popular alternatives
Mariah - I like the pronunciation - it’s the old English way of saying Maria (the Italian is Ma-ree-ah like we say it now).. but the spelling does make me think M Carey
Nieve - it’s spelt Niamh. I think it blurs too much with all the Eves
Vivienne/Vivian - really like the first version, second simpler spelling is Vivien for a girl, Vivian is the male.
Carys/Cerys - love it
Ines - love it and woefully underused. Lois is also nice
Roseanne - prefer Rosanna
Maeve - sounds like Mauve. Also no good if you want something unusual
Rosalie -Rosanna is nicer
Isa - Short for Isabella?
Ariel - Ok
Noah/Noa - Noah is male, Noa female. It’s getting very popular
Noelle - no, maybe as the middle name of a Christmas baby
Jemima - nice, if a little twee