Which combo?

Which combo works best as a sister to [name_f]Sybil[/name_f] [name_f]Beatrice[/name_f]? If none of them “fit” suggestions are definitely appreciated!

[name_f]Sybil[/name_f] [name_f]Beatrice[/name_f] / [name_f]Perdita[/name_f] [name_f]Blythe[/name_f]
[name_f]Sybil[/name_f] [name_f]Beatrice[/name_f] / [name_f]Rosalind[/name_f] [name_f]Blythe[/name_f]
[name_f]Sybil[/name_f] [name_f]Beatrice[/name_f] / [name_f]Perdita[/name_f] [name_f]Alice[/name_f]
[name_f]Sybil[/name_f] [name_f]Beatrice[/name_f] / [name_f]Rosalind[/name_f] [name_f]Alice[/name_f]

[name_f]Rosalind[/name_f] [name_f]Blythe[/name_f]!

Either [name_f]Rosalind[/name_f] [name_f]Blythe[/name_f] or [name_f]Rosalind[/name_f] [name_f]Alice[/name_f]… I dislike [name_f]Blythe[/name_f] as a name, and find it a bit matchy with [name_f]Beatrice[/name_f], but think it flows better with [name_f]Rosalind[/name_f] than [name_f]Alice[/name_f] does. Would you consider [name_f]Rosalind[/name_f] [name_f]Perdita[/name_f]?

[name_f]Sybil[/name_f] [name_f]Beatrice[/name_f] and [name_f]Rosalind[/name_f] [name_f]Alice[/name_f] would be gorgeous.