I quite like
Esme and I think it would work well with
Isabel.
Esme Jacinthe is one of my favourite combinations, I also like the following:
Esme VioletEsme CordeliaEsme OliviaEsme MirandaEsme FrancesEsme GrierEsme GenevieveEsme Lilianna
Esme Marissa
Schuyler