Johnny ranks at #615 with 200 entries, registered male. The name is the friendly diminutive form of John, and on a pet registry it reads as the casual cousin to the more formal human use. Johnny-the-dog is usually the easy-going one, the dog at the cookout greeting everyone.
The casual-American-male cohort
Johnny sits with Charlie, Jimmy, Tommy, and Bobby in the friendly-nickname-as-formal-name pet pocket. These are diminutives that owners use as the full name on the licensing form, signaling a casual, approachable household register from the start. The naming logic refuses formality; the dog is a buddy, not a charge.
Pop-culture anchors
Johnny carries multiple loose anchors: Johnny Cash for the country-music register, Johnny Depp for the Gen X overlay, and Johnny from Cobra Kai for the more recent streaming-era reference. None dominates the way a single character anchors some pet names; Johnny is broad enough that owners rarely have one specific cultural hook in mind.
Sound and breed lean
Two syllables, front-stressed (JON-ee), with a clean call-recall shape and no consonant clusters that get lost across a yard. The name lands across a wide breed range without strong concentration; it reads slightly more on medium-sized friendly breeds like Labradors, Beagles, and Golden Retrievers, but it works on almost anything. The human Johnny page shows declining mid-century SSA use; pet Johnny holds the casual register that human Johnny has partly vacated.