I love
Bette! It's so chic. I personally like the one-syllable version. I can't imagine it'll ever become truly popular, but now would be a good time for it. I suspect that names like
Betty will be making a comeback, so
Bette might be too!
Eliza is also really charming. I'm not a huge fan of Elizabeth-names but both
Bette and
Eliza are forms I love.
Eliza has the kind of energy
Emma once had for me - quaintly and firmly British.