You'll see there are lots of things about Jaz...that are perfectly correct. So don't worry about 'slang' idioms etc...

What do you prefer? Its you who's going to use the name more than anyone... which one runs off your tongue best? Go with that.
She's never going to use the name... she'll only respond to it !

Congratulations anyway !! whatever you choose.

Angelwings.

If the grass is greener on the other side, its sure the water bill is higher !