Mini ranks at #304 with 380 entries, and it is one of the most exclusively size-driven names on the chart. The descriptor functions as the name precisely because owners pick it the moment they realize the pet is going to stay small, and the name commits to that observation forever.
The size-descriptor tradition
Mini clusters with Peanut, Tiny, and Bean in the smallness-as-name register. These names treat the pet's compact size as its defining feature, and they appear across both dogs and cats. Mini reads slightly more deliberate than Tiny — less accidental, more like an actual chosen name with a descriptive backbone.
Where Mini lands
Toy and small breeds carry the name at overwhelming rates: Chihuahuas, Yorkies, Pomeranians, Maltese, Toy Poodles, Miniature Schnauzers, kittens that stay small, and small mixed breeds in particular. The name reads ironic and occasionally exactly the joke owners are making on a Great Dane or a large dog, but those cases are rare exceptions.
The fashion-house counter-reading
One reading worth flagging: Mini also reads as a fashion-coded name (Mini Cooper, mini-skirt, Mini in the broader cute-fashion register), which pulls a specific cluster of owners drawn to a slightly cosmopolitan or stylish register. The reading rarely surfaces explicitly but does coexist with the size-descriptor reading. The Mini baby name page shows it has effectively never been a meaningful human pick — Mini reads as pure pet-name territory.