It's a pity this name has such a bad meaning ("not exalted") and history, because I do love its sound. And it's a nice alternative for other popular
-bel names like
Isabel and
Annabel.
But still, I wouldn't use it. The Biblical connotations are just too much, and the negative meaning clinches it for me.
I do, however, think the name should go without a nn if you insist on using it.
Jezebel's so unusual and pretty in full that nning the child Jezzie or Bel(lle) just brings down the name imo.
Miranda