I’m actually surprised that Serphina isn’t higher than that in the US! I think of the girls names you have listed this is the one that seems most likely to hit top 1000.
I think the other names are really an acquired taste, and although they may seem well liked on this site, the general public obviously don’t share the same style or taste in names. I think all of the names you have listed are beautiful and in order of preference I like; [name]Isadora[/name], [name]Persephone[/name], [name]Seraphina[/name], [name]Hermione[/name], [name]Guinevere[/name] & [name]Cordelia[/name] (I don’t like the sound!).
[name]Seraphina[/name] is the one that seems most likely, followed by [name]Isadora[/name] because it is a fresher alternative to [name]Isabella[/name]! The others I really can’t see as breaking the top 1000 (although I don’t live in the US so it’s just my thoughts).
In the UK there were 18 [name]Seraphina[/name]'s, 33 [name]Cordelia[/name]'s, 23 [name]Isadora[/name]'s, 4 [name]Guinevere[/name]'s, 7 [name]Persephone[/name]'s and 111 [name]Hermione[/name]'s, so while [name]Hermione[/name] is the least popular of the names you listed in the US, it the most popular here and I think that will all be because of [name]Hermione[/name] [name]Grainger[/name] and the [name]Harry[/name] [name]Potter[/name] books and films, but even then the name hasn’t broken top 100 (#265 - 165 babies in 2003) and as the [name]Harry[/name] [name]Potter[/name] films are all but finished and the name is most associated with those, I wouldn’t worry about that one at all.
As for the boys names I love [name]Atlas[/name], and there hasn’t been any borns ever (well, since 1996) named [name]Atlas[/name] in the UK and 99 out a country the size of the US isn’t really too bad (Wasn’t there like 20,000 [name]Jacob[/name]'s or something the other year? - the Uk’s top was about 8,000).
I don’t see [name]Vladimir[/name] becoming overly popular either.
Middle names…
[name]Seraphina[/name] [name]Ottiline[/name], [name]Seraphina[/name] [name]Charis[/name], [name]Seraphina[/name] [name]Ramone[/name], [name]Seraphina[/name] [name]Lilith[/name], [name]Seraphina[/name] [name]Primrose[/name], [name]Seraphina[/name] [name]Laurel[/name]
[name]Persephone[/name] [name]Maris[/name], [name]Persephone[/name] [name]Lilou[/name], [name]Persephone[/name] [name]Iris[/name], [name]Persephone[/name] [name]Violet[/name], [name]Persephone[/name] [name]Willow[/name], [name]Persephone[/name] [name]Carmen[/name]
[name]Cordelia[/name] [name]Roisin[/name], [name]Cordelia[/name] [name]Faye[/name]. [name]Cordelia[/name] [name]Josephine[/name], [name]Cordelia[/name] [name]Beatrix[/name], [name]Cordelia[/name] [name]Anneliese[/name], [name]Cordelia[/name] [name]Simone[/name]
[name]Isadora[/name] [name]Vivienne[/name], [name]Isadora[/name] [name]Beatrix[/name], [name]Isadora[/name] [name]Clementine[/name], [name]Isadora[/name] [name]Mabel[/name], [name]Isadora[/name] [name]Maeve[/name], [name]Isadora[/name] [name]Madeline[/name]
[name]Guinevere[/name] [name]Sophia[/name], [name]Guinevere[/name] [name]Frances[/name], [name]Guinevere[/name] [name]Edith[/name], [name]Guinevere[/name] [name]Alice[/name], [name]Guinevere[/name] [name]Charlotte[/name], [name]Guinevere[/name] [name]Magdalene[/name]
[name]Hermione[/name] [name]Georgia[/name], [name]Hermione[/name] [name]Saskia[/name], [name]Hermione[/name] [name]Elsa[/name], [name]Hermione[/name] [name]Veda[/name], [name]Hermione[/name] [name]Alexandra[/name], [name]Hermione[/name] [name]Matilda[/name]
[name]Atlas[/name] [name]Gabriel[/name], [name]Atlas[/name] [name]Edmund[/name], [name]Atlas[/name] [name]Frederick[/name], [name]Atlas[/name] [name]Nathaniel[/name], [name]Atlas[/name] [name]Benjamin[/name], [name]Atlas[/name] [name]Benedict[/name], [name]Atlas[/name] [name]Henry[/name], [name]Atlas[/name] [name]Oliver[/name], [name]Atlas[/name] [name]Quinlan[/name], [name]Atlas[/name] [name]Joseph[/name], [name]Atlas[/name] [name]Victor[/name]