The story of Kelby
Kelby is rare for boys in the United States, ranked #5,313 in 2025 with 18 babies given the name. It is currently declining compared with a decade ago.
Since 1948, 5,582 American babies have been named Kelby, about 72% boys and 28% girls, making it a genuinely unisex name. Its peak came in 1991, when 277 newborns received the name, the signature sound of the 1990s.
The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Kelby stood among all boys' names in any year, or use the compare tool to plot it against other names.