Krypto appears 64 times at rank 1610 on male pets. The source is unambiguous: Krypto the Superdog, Superman's white Kryptonian canine companion who has appeared in DC Comics since 1955 and received renewed attention through the 2022 animated film DC League of Super-Pets. White-coated dogs are the primary recipients.
The Superman Canine Canon
Krypto the Superdog is one of the oldest and most beloved animals in superhero comics — a Labrador-type dog with Superman's powers who is loyal, noble, and occasionally saves the day while wearing a red cape. Naming a dog Krypto is a specific comic book or superhero film statement. It sits alongside Ace (Batman's dog) and Thor in the superhero-canonical pet name set.
The 2022 Film Boost
DC League of Super-Pets gave Krypto a mainstream animated film profile that extended his recognition beyond comic readers to family audiences. White dogs — white Labradors, Samoyeds, and American Eskimo Dogs — fit both the visual character model and the heroic register. The name's K spelling distinguishes it from Crypto, the cryptocurrency, which is a coincidental association owners may wish to acknowledge or ignore.
The Counter-Reading
Krypto requires the dog to be either white or heroic in personality — ideally both. On a white, noble, protective dog, the name is simply accurate. On a brown, anxiety-prone rescue mutt named Krypto, the aspiration is endearing. Both are valid.