In search of soft, elegant old fashion and vintage girl names with cutesy nickname options. Also preferably uncommon.
Some of my favs are [name_f]Adeline[/name_f], [name_f]Hazel[/name_f], [name_f]Arabella[/name_f], [name_f]Beatrice[/name_f], [name_f]Cecelia[/name_f], [name_f]Estella[/name_f], [name_f]Eleanor[/name_f], [name_f]Florence[/name_f], [name_f]Genevieve[/name_f], [name_u]Paisley[/name_u], [name_f]Violet[/name_f], [name_u]Rowan[/name_u]
[name_f]Laurel[/name_f] (lore, [name_f]Ellie[/name_f])
[name_f]Helen[/name_f] ([name_m]Lenny[/name_m], [name_f]Nell[/name_f], [name_f]Elle[/name_f])
[name_u]Eloise[/name_u] ([name_u]Lou[/name_u], [name_f]Ellie[/name_f])
[name_f]Harriet[/name_f] ([name_f]Hattie[/name_f])
[name_f]Josephine[/name_f] ([name_u]Josie[/name_u]) (finny)
[name_f]Virginia[/name_f] (ginny)
[name_f]Arabella[/name_f] ([name_u]Ari[/name_u], [name_f]Belle[/name_f], [name_f]Bella[/name_f])
[name_f]Isadora[/name_f] ([name_u]Izzy[/name_u], [name_f]Dori[/name_f])
[name_f]Georgina[/name_f] ([name_u]Georgie[/name_u], [name_f]Gini[/name_f])
[name_f]Theodora[/name_f] ([name_f]Teddi[/name_f], [name_f]Dori[/name_f], [name_f]Thea[/name_f])
[name_f]Mariella[/name_f] ([name_f]Mari[/name_f], [name_f]Ellie[/name_f], [name_f]Ella[/name_f])
[name_f]Anastasia[/name_f] ([name_f]Ani[/name_f]/[name_f]Annie[/name_f], [name_f]Staci[/name_f]/[name_u]Stacy[/name_u])
If you’re looking for uncommon names, I’d throw out [name_f]Cecelia[/name_f], [name_f]Eleanor[/name_f], [name_u]Paisley[/name_u], [name_f]Violet[/name_f], and [name_u]Rowan[/name_u].
[name_f]Estella[/name_f] and [name_f]Beatrice[/name_f] are the only names on here that actually seems uncommon to me personally. I love [name_f]Estella[/name_f], but I prefer [name_f]Estelle[/name_f] with nn [name_f]Stella[/name_f] 
I second all of @renee423’s posts as well! I love [name_f]Virginia[/name_f], [name_f]Laurel[/name_f], and [name_f]Harriet[/name_f]. I think [name_f]Helena[/name_f] is a really regal, soft vintage name as well.
[name_f]Ophelia[/name_f] ([name_f]Lia[/name_f])
[name_f]Sylvia[/name_f] ([name_f]Sylvie[/name_f])
[name_f]Harriet[/name_f] ([name_f]Hattie[/name_f])
[name_f]Stella[/name_f] ([name_f]Ellie[/name_f])
[name_f]Adela[/name_f] ([name_f]Ada[/name_f], [name_f]Della[/name_f])
[name_f]Cordelia[/name_f] ([name_f]Cora[/name_f], [name_f]Della[/name_f])
[name_f]Agatha[/name_f] ([name_f]Aggie[/name_f])
[name_f]Margaret[/name_f] ([name_f]Maisie[/name_f])
[name_u]Marion[/name_u] ([name_f]Mamie[/name_f] or [name_f]Minnie[/name_f])
[name_f]Tabitha[/name_f] ([name_f]Tabby[/name_f])
[name_f]Winifred[/name_f] ([name_f]Winnie[/name_f] or [name_m]Fred[/name_m]/[name_u]Freddie[/name_u])
[name_f]Dorothy[/name_f]/[name_f]Dorothea[/name_f] ([name_f]Dot[/name_f]/[name_f]Dottie[/name_f])
[name_f]Frances[/name_f] ([name_u]Frankie[/name_u])
[name_f]Imogen[/name_f] ([name_f]Immy[/name_f]/Idgy)
[name_u]Love[/name_u] this post, vintage elegant names are some of my favourites and there are some great recommendations here!
A few more:
[name_f]Adelaide[/name_f]
[name_f]Aurora[/name_f]
[name_f]Beatrix[/name_f]
[name_f]Clementine[/name_f]
[name_f]Constance[/name_f]
[name_f]Dorothy[/name_f]
[name_f]Florence[/name_f]
[name_f]Isadora[/name_f]
[name_f]Jacqueline[/name_f]
[name_f]Josephine[/name_f]
[name_f]Marjorie[/name_f]
[name_f]Penelope[/name_f]
[name_f]Rosalind[/name_f]
[name_f]Rosemary[/name_f]
[name_f]Theodora[/name_f]
[name_f]Victoria[/name_f]
[name_f]Vivienne[/name_f]
[name_f]Louisa[/name_f]
[name_f]Harriet[/name_f]
[name_f]Estelle[/name_f]
[name_f]Margaret[/name_f]
[name_f]Iona[/name_f]
[name_f]Ada[/name_f]
[name_f]Agatha[/name_f]
[name_f]Agnes[/name_f]
[name_f]Olive[/name_f]
[name_f]Esther[/name_f]
[name_f]Winifred[/name_f]
[name_f]Clementine[/name_f]
[name_f]Beatrix[/name_f]