Philippa, Theodora and Seraphina need more sisters (for a story)

Hello everybody!
I would like to write a story about 6 sisters. My original thoughts were [name_f]Catherine[/name_f], [name_f]Philippa[/name_f], [name_f]Margaret[/name_f], [name_f]Elizabeth[/name_f], [name_f]Theodora[/name_f] and [name_f]Seraphina[/name_f] but I realized that [name_f]Elizabeth[/name_f] [name_f]Margaret[/name_f] and [name_f]Catherine[/name_f] sound like their own sib-set. I would like for the names to flow. I have Synesthesia and so I see [name_f]Philippa[/name_f] and [name_f]Seraphina[/name_f] aand pink and [name_f]Theodora[/name_f] as purple. So in my mind they go together very well. I am thinking maybe I could add [name_f]Adela[/name_f] or [name_f]Estella[/name_f] but I’m not really feeling it. [name_f]Do[/name_f] you think [name_f]Catherine[/name_f], [name_f]Philippa[/name_f], [name_f]Margaret[/name_f], [name_f]Elizabeth[/name_f], [name_f]Theodora[/name_f] and [name_f]Seraphina[/name_f] could go together? I’m really uncertain and would be happy about any feed back. I also [name_f]Georgina[/name_f], [name_f]Margaret[/name_f], [name_f]Elizabeth[/name_f] and [name_f]Catherine[/name_f] if you prefer the others.