What would Pearl's sister be called?

[Neverdonethisbefore]

Just that really. I'm open to ideas but am trying to avoid names in the top 100.

Coralie
Hope
Amelie
Theodora
Millicent
Saskia
Cecilia

Olive is the name I want for this bump. I have a Meg if that suits?

Maeve
Lilian
Evelyn

Violet

Louisa. For some reason I just think Pearl and Louisa go beautifully.

Cecily (sp?)
Iris
Violet
Elsie
Esme
Evelyn
Dorothy

I have an 8 year old Pearl and her big sister is Iris.
If ds was a girl he would have been Dorothea, Augusta, Beryl or Thisbe. But none of those suited him when he was born