Calvin ranks at #593 with 207 entries, registered male. The name is Latin-derived (from calvus, "bald") and arrived in English as a Protestant theological surname-to-given-name through the legacy of theologian John Calvin (1509-1564). On the pet side, the theological lineage matters less than the warm two-syllable shape and the Calvin-and-Hobbes overlay.
The Calvin-and-Hobbes lineage
Bill Watterson's comic strip Calvin and Hobbes ran from 1985 to 1995 and shaped how an entire generation hears the name: imaginative, troublemaking, fundamentally good-hearted. Owners reaching for Calvin on a dog are very often picking the name with the comic strip in mind, particularly for a smart, mischievous puppy that pulls strings and steals socks.
Breed lean and sound
Two syllables, front-stressed (CAL-vin), with a hard percussive opening and a clean N-landing. The name recalls cleanly across distance. It lands on a wide range of breeds without strong size correlation — Labradors, Beagles, mixed working dogs, and the occasional French Bulldog. Cats wear it less often; the name has a distinctly canine register.
The human crossover
The Calvin baby name page shows the name sitting solidly in the SSA top range, with a long history of human use predating the comic strip. Pet and human Calvin are sharing a moment, and the cohort overlap is real — Calvin Klein founder, Calvin from the comic, and the various human Calvins all sit alongside the pet cohort without crowding.