Instead of [name]Isabel[/name] how about [name]Annabel[/name], [name]Mirabelle[/name], [name]Arabella[/name], [name]Isaline[/name], [name]Isla[/name], [name]Iris[/name], [name]Ivy[/name], [name]India[/name]?
Instead of [name]Olivia[/name] maybe [name]Livia[/name], [name]Liv[/name], [name]Olive[/name], [name]Livana[/name], [name]Lydia[/name], [name]Odette[/name], [name]Oriana[/name], [name]Vivienne[/name], [name]Viviana[/name], etc?
Names that can give you the nn [name]Evie[/name] - [name]Evenie[/name] (My fav!), [name]Eveline[/name], [name]Evelina[/name], [name]Eva[/name], [name]Evelyn[/name].
Names similar to [name]Juliet[/name] - [name]Julia[/name], [name]Julienne[/name], [name]Harriet[/name], [name]Scarlett[/name], [name]Violet[/name].
Names that I just think work well with [name]Rosalie[/name]:
[name]Claudia[/name]
[name]Penelope[/name]
[name]Tabitha[/name]
[name]Sophie[/name]
[name]Martha[/name]
[name]Camille[/name]
[name]Imogen[/name]
[name]Alice[/name]
[name]Beatrix[/name]
[name]Jessamine[/name]
[name]Bridget[/name]
[name]Lorelei[/name]
[name]Edith[/name]
[name]Margot[/name]
[name]Eliza[/name]
[name]Elspeth[/name]
[name]Eloise[/name]
[name]Fiona[/name]
[name]Georgina[/name]
[name]Gabrielle[/name]
[name]Louisa[/name]
[name]Charlotte[/name]
Best of luck and hope that starts you off!
I think [name]Rosalie[/name] [name]Katherine[/name] is beautiful by the way