As more evidence points towards the existence of a new planet in our solar system, scientists will need an official name to designate it with. "Planet X" is just a placeholder, and thus is ineffectual as a long term option. "Brian" is succinct, easy to remember, and will add a modern touch to the pantheon of classic Roman-based planet names. Imagine the potential for public enthusiasm and support when future space probes land on the face of Brian.