I named my shepherd DeNiro, after Robert DeNiro, he has the dark face and a black mole right where Robert DeNiro has one. He lightened up a bit on his coat, but we stuck with DeNiro.
My dog (half black Lab, half Sneaky Neighbor's Dog, or so I'm told) has a "real" name, but the only time she hears it is when it's coupled with a formal command. Usually I call her "puppy" or "pup-pup."How about "Dog". Bet GSP I ever had was named Dog.