Polly ranks at #619 with 199 entries, registered female. The name is a centuries-old English diminutive of Mary that has carried over into pet naming in two distinct registers: the proper-old-fashioned-feminine pick, and the Polly-the-parrot stock character. Some chart entries are likely actual birds.
The species ambiguity
Polly is the default fictional parrot name in English-language pop culture, anchored by centuries of "Polly want a cracker" jokes. NYC and Seattle pet licensing systems primarily register dogs and cats, but a small portion of registry Polly entries may be parrots licensed through edge cases or paperwork classification. The remainder splits between dogs and cats given the name as a vintage-feminine pick.
The vintage-feminine register
Polly sits with Molly, Dolly, Holly, and Sally in the rhyming-old-fashioned-feminine pet pocket. These are diminutives that have largely faded from American human-naming charts but kept a steady second life on pets. The naming logic leans into the unfashionable warmth: owners deliberately picking a name their grandmother might have used, refusing the contemporary register.
Sound and breed lean
Two syllables, front-stressed (POL-ee), with a soft middle and clean call-recall. The name lands disproportionately on small-to-medium friendly breeds: Cocker Spaniels, Cavaliers, Beagles, and small mixed companions. The human Polly page shows the name almost entirely off the SSA top charts; pet Polly carries the warmth that human Polly has nearly fully vacated.