Kirby is a distinctive boys' name in United States, ranking #1621 in 2000 with 73 recorded births. The name reached its all-time peak in 1996 with 131 births ranking #972. Since 1996, the popularity has decreased by 44.3%. In 2000, approximately 1 in every 26,903 boys born was named Kirby. FALLING Recent data shows the name is currently falling.