Pets have names?!

I'm a ranger/necromancer, and im having a great time playing this game! It's soo much fun, however I noticed that when I group with a ton of rangers, some have names for their pets... Mine is just called M(something)'s stalker, but then I saw a ranger who had the same thing, however his cat was called Tom... anyone know how to name your pets?

Any help would be greatly appreciated

/petname *name* or /namepet *name*

Wow, I can't believe it was that easy, many thanks.