My road bike is named Hephalocipede, because I think it's fast and I like the word hephalump, also I call it Heph for short. My commuter is named Elmer, like the cartoon character Elmer Fudd, because it's stodgy and silly looking, but reliable and endearing.
If I ever start my own bike company, the mountain bikes are going to be called
MUD RHINO, and the road bikes are going to be called
Mádrino. Our cross bike will be called "LudiCROSSpeed" and our high-end carbon fiber racer model will be called "Roadiculous." You read it here first