I think you could split your girls like:
(floral and frilly)
[name_f]Ginevra[/name_f] [name_f]Lily[/name_f]
[name_f]Magnolia[/name_f] [name_f]Pearl[/name_f]
[name_f]Viola[/name_f] [name_u]Florence[/name_u]
[name_f]Annemieke[/name_f] [name_f]Juliet[/name_f]
(stylish and modern)
[name_u]August[/name_u] [name_f]Linnea[/name_f]
[name_u]Flannery[/name_u] [name_f]Josephine[/name_f]
[name_f]Rhea[/name_f] [name_f]Genevieve[/name_f]
[name_f]Hera[/name_f] [name_f]Emmeline[/name_f]
(literary and classic)
[name_f]Johanna[/name_f] [name_u]Fern[/name_u]
[name_f]Norah[/name_f] [name_f]Thomasine[/name_f]
[name_f]Louisa[/name_f] [name_f]Ingrid[/name_f]
[name_f]Theodora[/name_f] [name_f]Selene[/name_f]
[name_f]Helena[/name_f] [name_f]Maud[/name_f]
As for your boys:
(gentler boys)
[name_u]Elliott[/name_u] [name_u]Michael[/name_u]
[name_u]Bennett[/name_u] [name_m]Nathaniel[/name_m]
[name_u]Emmett[/name_u] [name_u]Troy[/name_u]
[name_m]Ronan[/name_m] [name_m]Davies[/name_m]
[name_u]Jonah[/name_u] [name_u]Wesley[/name_u]
(literary and surnamey)
[name_m]Tennyson[/name_m] [name_u]Lyle[/name_u]
[name_m]Clark[/name_m] [name_m]Aslan[/name_m]
[name_u]Anderson[/name_u] [name_u]Hayes[/name_u]
[name_u]Jameson[/name_u] [name_u]Theo[/name_u]
(rugged and cool)
[name_u]Griffin[/name_u] [name_u]Jasper[/name_u]
[name_m]Lachlan[/name_m] [name_u]Rhys[/name_u]
[name_m]Stellan[/name_m] [name_m]Zachary[/name_m]
[name_u]Declan[/name_u] [name_m]Fitz[/name_m]
[name_m]Orson[/name_m] [name_m]Evander[/name_m]
Faves from your list: [name_f]Ginevra[/name_f] [name_f]Lily[/name_f], [name_u]August[/name_u] [name_f]Linnea[/name_f], [name_f]Viola[/name_f] [name_u]Florence[/name_u], [name_u]Flannery[/name_u] [name_f]Josephine[/name_f], [name_u]Bennett[/name_u] [name_m]Nathaniel[/name_m], [name_u]Griffin[/name_u] [name_u]Jasper[/name_u], [name_m]Clark[/name_m] [name_m]Aslan[/name_m], [name_m]Stellan[/name_m] [name_m]Zachary[/name_m], [name_m]Orson[/name_m] [name_m]Evander[/name_m].
Also, these single names: [name_m]Abel[/name_m], [name_u]Emmett[/name_u], [name_u]Atlas[/name_u], [name_u]Wilder[/name_u], [name_m]Rafferty[/name_m], [name_u]August[/name_u], [name_f]Saskia[/name_f], [name_f]Anya[/name_f], [name_f]Caia[/name_f], [name_f]Elara[/name_f], [name_f]Cecily[/name_f] and [name_f]Rosalind[/name_f]!
Some combos with those: [name_m]Abel[/name_m] [name_m]Fletcher[/name_m], [name_u]Atlas[/name_u] [name_u]Jude[/name_u], [name_u]Wilder[/name_u] [name_m]Magnus[/name_m], [name_m]Rafferty[/name_m] [name_m]Orwell[/name_m], [name_u]August[/name_u] [name_u]Callahan[/name_u], [name_f]Saskia[/name_f] [name_f]Beatrix[/name_f], [name_f]Anya[/name_f] [name_f]Leonie[/name_f], [name_f]Caia[/name_f] [name_f]Margot[/name_f], [name_f]Elara[/name_f] [name_u]Fable[/name_u], [name_f]Cecily[/name_f] [name_f]Josette[/name_f], [name_f]Rosalind[/name_f] [name_f]Gaia[/name_f].
A few other suggestions: [name_f]Penelope[/name_f], [name_f]Eliora[/name_f], [name_f]Leonie[/name_f], [name_f]Cosette[/name_f], [name_f]Magdalen[/name_f], [name_f]Pomeline[/name_f], [name_f]Willa[/name_f], [name_u]Prairie[/name_u], [name_u]Abilene[/name_u], [name_f]Keziah[/name_f], [name_f]Dinah[/name_f], [name_u]Romilly[/name_u], [name_f]Nadia[/name_f], [name_m]Timon[/name_m], [name_u]Meridian[/name_u], [name_m]Alec[/name_m], [name_u]Brody[/name_u], [name_u]Maxwell[/name_u], [name_u]Julian[/name_u], [name_u]Ira[/name_u]