Cc appearing in pet licensing registries is almost certainly a data artifact — an owner who wrote a nickname, abbreviation, or initials in the name field rather than a full name. The 41 registrations almost certainly represent 41 different actual names that got recorded as the same two-letter string.
Registry Artifacts and What They Reveal
Pet licensing databases capture whatever an owner writes on the form. Nicknames, abbreviations, and informal shorthands get entered as formal names. Cc is consistent with someone writing initials — perhaps a dog whose name was something like "Coco" or "Cookie" or "Cleo" and the form captured only the first two letters, or a dog genuinely known by initials at home.
Deliberate Initial Names
Some owners do deliberately choose initial names for pets — it's a human naming tradition that carries over. A dog called C.C. isn't unprecedented; it suggests a certain casual, retro feel. If you're exploring short pet names, the full pet names index has genuine options like browsing by letter that sidestep the registry ambiguity entirely.
The Counter-Reading: Not Really a Usable Name
For practical purposes, Cc isn't a name most people would intentionally choose for a dog. If you're drawn to short names, two-syllable options like Coco or Cleo give you the same breezy energy with actual semantic content behind them.