Cognofloof

Cognofloof (floofinition) – Additional personal name given to a housepet or animal.

In use: “Although the terrier’s formal name was Sir Jack Black (because he was a Jack Russell and his rescuer’s daughter was a Jack Black fan), his cognofloofs included Jackie, Missile (often shortened, itself, to Miss, or Mizz) for his proclivity to bolt across a yard or room, and Thumper, for his furiously wagging tail.”