Josephine Clara by a long ways!
As a sister for Emmeline, I think Adelaide would work well.
Emmeline and Charlotte
Emmeline and Rosalind
Emmeline and Felicity
Emmeline and Lydia
Emmeline and Genevieve
Emmeline and Stella
Emmeline and Abigail
Emmeline and Penelope
Emmeline and Matilda
Emmeline and Silvia
Thanks! I really like Penelope!
Josephine Clara gets my vote.
I'm an Emmeline (though with the ee pronunciation and an odd spelling.) My mother mentioned something about a suffragette namesake.. I assume Emmeline Pankhurst. I like Josephine because she also has a suffragette namesake in Josephine Butler.
Emmeline Pankhurst's daughters were Christabel Harriette and Estelle Sylvia (known as Sylvia.) Also good possibilities for your sibset.
A few more suffragette names:
Sophonisba (this one's crazy, but had to be mentioned)
Tennessee Celeste (ditto)
Brielle Amethyst - I like this, it takes it in more of a french direction if you didn't want to go with the suffragette names
Genevieve, Adelaide would fit in this sib-set
Josephine Clara - Super cute
Penelope, Felicity, Abigail would fit in this sib-set
Auralie Amaya - I'm not a fan of this name
Darcy Juliette - I think of Darcy as a boys name sorry