Love!:
Juliet or Julia - Juliet, I think is a beautiful name and is so nice to say. Julia somehow is dull in comparison and much mor common.
Georgia - Gorgeous, lovely meaning for you, and there is the lovely song 'Georgia on My Mind' but I think that is about the US State Georgia!
Charlotte - another gorgeous name that is lovely to say. I really dislike Charlie as a short version, but love Lottie!
Madeline (“line” pronunciation like the books) - beautiful, sort of dreamy and poetic.
May - I love this name, it was top of my list for girls as it is a family name. People might think it boring though as it has been so overused as a middle name.
Susannah - Love Susannah, unusual these days too. Susan was an extremely popular baby name for women who are now in their 70's so some might find it a bit odd.
Heidi - Gorgeous, was high up on my girl names list.
Nice:
Pippa - really cute.
Caroline (“line” pronunciation) - it's alright, almost certainly won't be any others in her class, Caroline is way nicer than just Carol.
Elizabeth “Eliza” - nice, classic.
Louisa -nice classic
Tessa “Tess” - really love, but it does tend to be a dog or horses name.
Margot “Maggie” - I used to love Margot but I think it's a bit too common now and so many people on here say it reminds them of Maggot, which I never noticed before and now I can't unsee it. However, I'm not sure why you would name her Margot but call her Maggie? Just name her Maggie? Bit weird.
June - A Handmaids Tale - what a woman! I quite likely but it is a bit on the wrong side of old lady names to me.
Serena - also A Handmaids Tale, a complicated character. It's quite a nice name.
Natalie or Natalia - I love the way Natalie is said in an English voice and when all letters are pronounced (apart from the 'e' of course), I don't like the American pronunciation at all, or when the English drop the t's. Not a fan of Natalia, not sure why!
Dahlia - Nice, a beautiful flower! But do you say Darr-lia or Day-lia. Whichever way she'll have to let people know forever.
Strongly dislike:
Flora - absolutely awful, it is a margarine or the name of a cow in a meadow.
Violet - horrible, mean girl vibes, really hate the name Violet but a lot of people like it right now.
Bridget - Makes me think - Bridgerton, god awful silly TV series! Though I might be the only person that thinks that. Old fashioned, old money, bit stuck up.
Felicity - She'd be friends with Violet and they'd be mean girls together.
Grace - dull, way too many about now.
Elise - nah, dull, much prefer Eliza
Suggestions: Suzette, Claire, Joanie
Great list OP, good luck and congratulations!