Roger ranks at #636 with 194 entries, registered male. The name is a Germanic-origin human name (literally "famous spear," carried into English via Norman French), heavily mid-century-American in human use, and on a pet registry it lands squarely in the dad-name pet pocket alongside Larry and Bob.
The deliberately-uncool human name cohort
Roger sits with the same deliberately-plain-human-name pet cohort as Bob, Larry, Steve, and Doug. The naming logic is anti-aesthetic: the dog gets a name that reads as a 1965 office colleague rather than anything aspirational, and the household humor lives in the contrast. Roger has slightly more dignity than Bob and slightly less swagger than Frank; it is the name's middle-of-the-road register that owners are picking.
The 101 Dalmatians overlay
For owners who came of age with the 1961 Disney film 101 Dalmatians (or the 1996 live-action version), Roger Radcliffe is the human owner-character at the center of the story, and the name carries a faint Dalmatian-association layer. The crossover is real but understated; most pet Rogers are not actually Dalmatians, but the cultural overlay still pulls the name slightly toward the family-dog register.
Sound and breed lean
Two syllables, front-stressed (ROJ-er), with a soft middle and a clean trailing R. The name carries cleanly outside. It lands disproportionately on stocky, friendly, slightly-grumpy breeds: Bulldogs, Basset Hounds, Beagles, and family rescue mixes. The human Roger page shows mid-century SSA dominance and a long decline.