I knew a girl in high school named Septimber and I thought it was a beautiful name, even it it wasn't spelled like the month. There are always Junes and Aprils and Mays. Even if you DID decide to use September (if you just can't stop thinking about it!) "Ember" is a nice nickname.

On the military base here, I heard a mom telling her little girl "December, hold still!" while they were trying on clothes.

I love those names, not sure yet if I'd use them, but certainly am impressed with people who do.