Can't find "the one" girls name

[NameThatGirl]

We found out that we're having a girl and we have a few name ideas but nothing feels like "the one".
Can anyone give me thoughts on the ones we do like or please add any others they think might be along the same lines?

We already have a boy called Stanley.

We like Penelope and Arabella but definitely won't use them as we don't like the shortenings of Penny or Bella. Same for Elsa, love it but I think it's TOO Disney.

We love Betsy and Otillie.

We also like Cleo, Ophelia and Celeste.

Any thoughts or anything too add that might be the elusive one?

Love all the names you've mentioned.
I think you change your mind a lot throughout pregnancy so I'd wait as you will know when the right one has come along you just will

Just to add
Claudia
Aubrie
Clarabella
Octavia
Allegra
Coco

I couldn't find 'the one' either - and actually, at 6 months old, I'm not completely sure I actually like my DD's name! I'm hoping she'll grow into it. I do like some of your names though, particularly Cleo. Some others we had on our list were

Alicia
Abigail
Alexandra
Antonia
Hannah
Marlena
Tallulah

I love Ottilie

Margot
Greta
Kitty
Rae

I like Ottilie too-

Margot
Cecelia
Aurelia
Clementine
Maud
Olive

Delphine
Talula
Tori
Nora
Bethany
Francine
Lydia
Josephine
Joy
Nadine
Dora
Ida
Jasmine
Thea
Lisette
Honor
Georgiana
Anna
Meredith
Merryn
Jemima
Clarissa
Clara
Hester
Florence
Flora
Cara
Wilhelmina (Mina)
Saskia

I like Ottilie, Pippa?

Out of the manes you mentioned on your OP, I have to say my favourite is Ophelia, and was one of my top choices when I was pregnant with my 2 girls, but I never went with it, but it is a beautiful name.

Odette?

I like Penelope. You can shorten to Nell.
Arabella is too flouncy. Annabel?
Elsa is very nice. I don’t think Disney at all.
I like Betsy but would have Elizabeth officially.
Otillie is horrid. Utterly Otter-ly. Matilda?
Cleo is OK. Not sure it goes with Stanley. Zoe? Dido? Iris?
Ophelia is horrid. Girl driven to madness who commits suicide. Felicity?
Celeste is OK. I would assume you were very religious. Celia?

Constance (Connie)
Melissa
Beatrice
Talia
Josephine
Roxanna
Cecilia
Christina
Margaretta
Phoebe
Serena
Philippa
Elspeth
Holly

Otillie is a gorgeous name although I might be worried in your case people would call the Stan and Ollie.
Alexandra or Allegra?

I researched Irish names and came across loved Ochille but DP would not let me. Now I can't find any evidence of my research. I still love the name. I also like Larkin and Clover.

Clara, Elodie also lovely

I love Cleo. I also second the suggestion of Octavia. How about:

Cecily
Eleanor
Sadie
Amelie
Maggie
Adela
Clarisse
Felicity
Evelyn
Rosalie
Maeve
Annie
Sophia
Violet
Tamara
Faith
Lilliana
Georgia
May
Chloe

I really like Stanley and Celeste or Stanley and Cleo.

I had a list when I went into hospital but didnt know what name I would choose until I saw my babies!
With my daughter I chose the name at the top of my list but I didnt with my son. He did not suit my top name at all! But one name jumped out of the list as soon as we saw him.

Octavia
Clara
Eloise
Lucinda

@NameThatGirl of your list I love Betsy (on my list spelled Betsey) and Cleo. Ophelia nice too. Not so keen on Ottilie and Celeste but just personal taste. Other suggestions, apologies for any duplicates -
Alice / Alys
Arrietty
Ariadne
Blossom
Bea
Bluebell
Caro
Cecily
Cora
Cordelia
Etta
Etnie
Eseld
Eloisa
Evadne / Evanthe
Evanora
Evelina
Elke
Gracie
Graciela
Greta
Gwendolyn
Gwyneth
Heidi
Honor
Harrietta
Hettie
Indiana
Ianthe
Isotta / Izotta
Florizel
Flora
Hebe
Ivy
Iris
Jeannie
Lucinda
Mary / Mairi
Margot
Nancy
Nell
Norah
Orpah
Ottilia
Phoebe
Pippa
Poppy
Renfri
Romilly
Rowenna
Sephora
Sylvie
Susannah
Tabitha
Thebe
Theia
Tilda
Trudie
Xanthe

Betsy is so cutesy and doesn't complement Stanley at all

How about Violet. Strong feminine and goes really well with Stanley.

Gosh, Violet isn’t a strong name to me. It’s the complete opposite. A small weed that’s trodden underfoot!

Love Ottilie and Celeste!

I love
Aphra
Venetia
Verena
(Spell check altered the last name to Verbena which is different and quite nice)

Ottilie not Otillie, OP.

I really like Betsy from your choices.