Simon ranks at #203 with 525 entries, and the name carries a quieter register than most male names at this rank. It reads as bookish, slightly old-fashioned, and intelligent, and the breeds and households it lands on tend to match that texture in our data.
The bookish-male cluster
Simon sits with Oliver, Oscar, and Winston in the slightly-bookish male cluster. These names tend to attract owners in the 30-50 age range who want a name that reads adult and slightly literary rather than rugged. The breeds that over-index on Simon (Cavaliers, Cocker Spaniels, Golden Retrievers, mid-sized mixed breeds) fit the same family-coded household register that the human-name version inhabits.
One counter-reading: Alvin and the Chipmunks's Simon (the smart one with glasses) and The Chronicles of Narnia's Mr. Tumnus's friend Simon (lesser-known but real) are not the dominant cultural anchors, but Simon Cowell and Simon & Garfunkel both add layers of texture. None of these dominates pet naming individually, but together they thicken the bookish register that the name reads in. Simon's Cat, the YouTube animated series, is the closest direct pet-naming influence, and it has produced a real subset of Simon cats in the past decade.
Where the name lands by breed
Cats over-index strongly on Simon, and the Simon's Cat connection is doing visible work in our data. Owners with a literary household register also pick the name for retrievers and Cavaliers at near-average rates, where the Simon-as-call-name reads warmly. The Simon baby name page shows the human chart, where the name has held a steady SSA top-300 spot since the early 2000s.