UB313 or Xena? You make the call

"In July, astronomers announced the discovery of what they considered the 10th planet, an icy world that swings 9 billion miles away from the sun and is almost certainly larger than Pluto. This weekend, they declared this object, informally known as Xena, also has a most planetlike feature: a moon."

They will name the moon Gabrielle. Trust me, I know geeks and nerds, its gonna be Gabrielle.

"Xena is technically named 2003 UB313 and will remain so until the IAU decides whether it is a planet. And IAU chooses the name itself."

Nope the name will be Xena forever. It is one of those certainties in life, kind of like calling someone "Stinky" as a joke. Once you get the name applied to you, your stuck with it.