This is a soft, soignée French name that has become familiar here via singer Solange Knowles, younger sister of Beyonce.
It is also the name of a martyred ninth century saint, a poor shepherdess who came to a tragic end while defending her honor. Among other things, St Solange is a patron saint of rain.
Solange would make a striking, sophisticated choice. Pronunciation: so-LAHNZH.