Peter ranks at #670 with 181 entries, registered male. The name is one of the most direct human-name borrows on the pet chart — Peter on a pet is unmistakably a person's name on a dog, and the choice signals a deliberate human-formality stance from the owner.
The full-human-name cohort
Peter clusters with Henry, Oliver, George, and Frank in the formal-male-human-name pet pocket. The cohort skews toward owners in their 30s and 40s who treat the pet as a small dignified person and pick names that hold up at the vet's front desk without ironic shortening. There is also a Peter Rabbit overlay for owners who grew up with the Beatrix Potter books.
Breed lean and sound
The name lands disproportionately on calm, well-mannered breeds — Cavaliers, Goldens, English Setters, and serious-looking mixes. It also lands on rabbits in measurable numbers, the Peter Rabbit echo. Two syllables, front-stressed (PEE-ter), with clean recall.
The counter-reading
Peter is unambiguously a male human name, which means every dog park introduction and vet appointment surfaces a brief flicker of "oh, the dog is Peter." Owners comfortable with the human-formality register do not mind; owners who want a more typical pet name pick something else.
The Peter baby name page shows the name in long, gentle decline since its mid-century peak — the pet register is now arguably the more contemporary use. Browse other formal-male picks.