Examples of Last-Name Basis in in Western Animation. * Most of the Safety Patrol on Fillmore refer to each other by last names, despite being middle schoolers. (Though if your first name was Cornelius, wouldn't you want to go by Fillmore?) Ingrid is usually called by her first name, but not always. * (Sheldon) Plankton from SpongeBob SquarePants. Not even his own grandmother calls him Sheldon. * None of the kids (besides Butters) in South Park call (Eric) Cartman by his first name. Only the adults call him that. * Kyle calls him "Eric" in the pilot episode. ("Come on, Eric, we're gonna go play at the bus stop!") * Wendy, Kenny and Butters sometime called him "Eric." As a rule, fewer characters do as time goes on; by now, it's mostly just the adults. * (Philip) Fry i