Sister for Matilda and Rupert?

[Purpleguppy]

Really, really stuck - all suggestions welcome!

Constance

Harriet

Rosalind

Alice

Cecily

Elyza
Alexia
Alice
Chloe
Ruby
Eva
Evie
Lorna
Rene
Daisy
Fleur

Anyonia

Whoops Antonia

Matilda, Rupert and...

Laura
Juliet
Georgia
Amelia
Penelope
Octavia
Victoria
Anna
Katherine
Esther
Harriet
Annabel
Eliza
Phoebe

Alice or Alys.

Jemima

Agatha
Adriane
Alberta
Alessa
Aloisia
Alice
Annalise
Berdina
Bernadette
Betsy
Chriselda
Caroline
Della
Delmy
Delmira
Elisabeth
Eloise
Elsha
Emyln
Etta
Evony
Faiga
Federica
Frederica
Frieda
Genevie
Genivee
Gisela
Harriet
Heidi
Henrietta
Idalie
Ilsa
Johannah
Karla
Katrina
Leonie
Landra
Liesl
Lisette
Lois
Loise
Liza
Loretta
Louanna
Lorelei
Lorna
Maritza
Mariel
Marelda
Maude
Millicent
Nadine
Odette
Odelia
Otilie
Rachel
Rosamund
Steffi
Selma
Winifrid
Zelma

Juno
Hermione
Iris
Lottie