Rocky

Rocky is a diminutive form of names beginning with 'Roc-' — most commonly Rock or Rocco — with roots in the Old Germanic 'hrok' and the Old Norse 'hrókr,' both relating to a rook or tower, symbols of strength and solid footing. The name took on a distinctly American character through the 20th century, becoming shorthand for resilience and scrappy determination. It is a name that says: this companion does not back down, whether chasing a ball or simply demanding attention on their own schedule.

Rocky claims the #7 spot with 4,686 entries, and it is the quintessential name for a companion with grit. The single hard syllable followed by the quick 'ee' ending creates a name that sounds like motion — punchy, fast, impossible to ignore when called at full volume across a park. Sylvester Stallone's Rocky Balboa made the name a cultural monument to the underdog spirit in 1976, and that association has made Rocky one of the most enduring names for spirited, determined pets ever since. What makes Rocky work so well is that it carries zero pretension: it is honest about what it admires — toughness, energy, and heart.