Board Thread:General Discussion/@comment-25926288-20151116014923/@comment-1894786-20151119004857

Y'all... Zelena was the unofficial queen of Oz. She was the strongest being there, lived in the Emerald Palace of the Emerald City. Her daughter would be the Princess of Oz. And canonically in the books, the Princess of Oz is called Ozma.

So most likely the name they'll choose is Ozma.