I like
Annabel and
Susannah, but think because they are both longish names, that perhaps a 1 syllable mn would sound prettier.
Annabel/Susannah
JaneAnnabel/Susannah
GraceAnnabel/Susannah
EveAnnabel/Susannah
RoseAnnabel/Susannah
Claire
I prefer
Annabel though unless you're from the south. I am weird like that though.