Ozzy

Ozzy is a diminutive of Oswald, from the Old English Osweald, meaning "divine power" — combining os, "god" or "divine," and weald, "power" or "rule." It also functions as a nickname for Oscar. As a standalone name, Ozzy has been culturally associated with Ozzy Osbourne, the rock legend, giving it an outlaw edge that sits amusingly against the fundamentally devoted nature of most beloved companions.

Ozzy ranks #189 among America's most popular pet names, and it carries a rock-and-roll energy that owners of energetic, slightly unpredictable companions particularly love. There is an implicit understanding in the name: this companion has opinions, has energy, has a way of doing things that is entirely their own, and would not be changed for anything. Ozzy is also the wizard name from The Wonderful Wizard of Oz, adding a layer of magical adventure beneath the rock edge.