I love your daughter’s names! These are my favorites for the sister set, so please forgive repeats.
[name_f]Elizabeth[/name_f], [name_f]Charlotte[/name_f], and …
[name_f]Abigail[/name_f] nn [name_u]Abby[/name_u]
[name_f]Amelia[/name_f] nn [name_f]Millie[/name_f]
[name_f]Margaret[/name_f] nn [name_f]Greta[/name_f] or [name_f]Gretchen[/name_f]
[name_f]Vivienne[/name_f] nn [name_f]Vivi[/name_f]
[name_f]Genevieve[/name_f] nn [name_f]Evie[/name_f] or [name_f]Vivi[/name_f]
[name_f]Florence[/name_f]
[name_f]Emily[/name_f]
[name_f]Emmeline[/name_f]
[name_f]Sarah[/name_f] nn [name_f]Sadie[/name_f] or [name_f]Sally[/name_f]
[name_f]Natalie[/name_f]
[name_f]Edith[/name_f] nn [name_f]Edie[/name_f]
[name_f]Helena[/name_f] nn [name_f]Nell[/name_f]
[name_f]Rose[/name_f] nn [name_f]Rosie[/name_f]
[name_f]Grace[/name_f] nn [name_f]Gracie[/name_f]
[name_f]Miriam[/name_f] nn [name_f]Mimi[/name_f]
[name_f]Audrey[/name_f]
[name_f]Josephine[/name_f]
I think you could also use [name_u]Kit[/name_u] for [name_f]Christine[/name_f], [name_f]Christina[/name_f], or [name_f]Christabel[/name_f].