One quick note: do we want a last name?
On to first names: I like mythology baby names better, but there are a few -ella names I like, namely Gisella, Isabella, Arabella, Estella, or Della. My favorite mythology names are:
Diana
Andromeda
Minerva
Io
Isolde
Antigone
Helen/Helena
Elaine
Vivienne
Persephone
Xanthe
I'm totally open to suggestions and/or spelling alternatives.