[Opinions] Re: at the risk of seeming very obvious ...
Annabelle doesn't sound Southern to me, though maybe it's the belle that does for others? It sounds old English children's book more than anything else to me.
Susannah does sound Southern, probably because of the song O Susannah. But it also sounds Puritan-era New England.
Before you criticize a man, walk a mile in his shoes. That way, when you criticize him, you're a mile away and you have his shoes!
Steve Martin