I like the sound of Yvaine, although it (unfortunately) reminds me of someone who is vain :/ Oh well. Probably better as a mn, it reminds me of
Yvonne, because of the spelling, and
Arabella, because of the aristocratic feel.
Liliana Yvaine, Caralina Yvaine,
Cecelia Yvaine and Jillianne Yvaine all sound pretty to me. Yvaine would look pretty with a sister named
Yasmin (ok, one's using Y as a consonant & the other as a vowel, but whatever...)
:)