Kirby is a distinctive boys' name in United States, ranking #2377 in 2015 with 55 recorded births. The name reached its all-time peak in 1996 with 131 births ranking #972. Since 1996, the popularity has decreased by 58.0%. In 2015, approximately 1 in every 34,841 boys born was named Kirby. FALLING Recent data shows the name is currently falling.