Having lovingly tended my massive list of possible names for months, I showed my partner once we found out we were having a girl and he was "surprised it wasn't longer." 
Here are our possibles, with the ones my partner seems more positive about at the top - they aren't necessarily my favourites.
Nothing is emerging as a clear winner yet, so new suggestions very welcome, or opinions on the ideas we have here.
Thank you!
Iris
Miranda (nn Miri?)
Esme/Ysmay
Evelyn (nn Linnet?)
Hazel
Ellen
Raphaelle
Emmeline
Eloise
Livia
Julia
Sylvie/Sylvia
Ruth
Hester/Esther
Bryony/Briar
Seren
Orla
Evelyn (nn Linnet)
Wren
Blaise
Lena
Saskia
Gwen
Celia
Lilian
Isabel
Leonie
Vesper
Tamsin
Meredith (nn Miri)
Marjory (nn Miri/Mari)
Maria/Marianne/Marion/Mariana
Alexandra
Zelda
Ursula
Sapphira
Tamar
Vivian
Celine
Keziah/Cassia
Cassandra
Zara/Sara
Ember
Erin
Xanthe
Jocelyn/Joyce
Clare
Laura
Peronelle
Yolande
Maeve
Honor
Freya
Adeline
Emma
Anya
Silke
Chloe
Zoe