Yes, the tenth planet (Planet X) has been given the temporary name of Xena. (This was after they learned there’s no such thing as aluminum phosdex.)
And now they’ve discovered it has a moon– which has, of course, been named Gabrielle.
Contrary to popular belief, this has nothing to do with Disney lawyers pitching a fit if the tenth planet was called Mickey. It was pointed out that if we called it what logically follows Pluto, we’d actually have a planet named Scooper.