Kitty

My new kitten!  Her 'official' name is Zen, but I've been more often calling her by the affectionate term Toontah.  My roommate's sister-in-law's cat just keeps getting pregnant, and so she was desperate to unload some kittens.  Zen was really shy when I went there, but the other eligible kitten seemed stuck up, so I chose Zen instead.  Totally made the right choice, she's awesome.

Should I just stick with calling her by one name, Zen or Toontah?  If so, which one?