Thanks girls, I think I've found it, one site says its a revamp of 'Nadine' which means hope. So it's not too bad.
Probably a dead giveaway to anyone trying to stalk me, but my sisters names are:
Dania & Chardelle
We had Adelle, which I love, but it doesnt use both names equally.
Dh is no help. I'd like something that sounds pretty. Any ideas?