Sonny ranks #221 with 494 entries and is one of the warmest male pet names in the entire chart. The name reads as a term of affection that has been formalized — calling someone or something "sonny" has been an American endearment for over a century, and pet owners pick the name knowing that warmth is doing most of the work.
The endearment-as-name register
Sonny works because it stays an endearment even after it becomes the formal name. The dog's name is also literally what the owner would call any friendly dog. The name skews heavily male and lands disproportionately on golden retrievers, Labradors, and bright-coated dogs whose visual matches the audio warmth.
One counter-reading: the name can feel slightly diminutive for a large or serious dog, and owners of mastiffs or Great Danes rarely pick Sonny without a deliberate ironic angle. The sweet spot is mid-sized friendly breeds where the name's warmth and the dog's temperament align.
Pop-culture echoes
Sonny Corleone in The Godfather (1972) is the strongest male-name cultural anchor, but pet owners rarely reference it — the warmth of the everyday endearment overshadows the cinematic association. Sonny & Cher (active 1965-1977) and the long American tradition of nicknaming sons Sonny both sit in the background.
Sound and adjacent picks
Two syllables (SUH-nee), front-stressed, with the universal -ee diminutive ending. Recall performance is excellent. The human Sonny page shows a small SSA presence. Owners cross-shopping warm male names often consider Buddy and Teddy alongside Sonny. Gender skew is heavily male, and the name pairs especially well with rescue dogs whose first owners' names are unknown — Sonny works as a fresh start that still feels like an old endearment.