Kirby is a distinctive boys' name in United States, ranking #1227 in 1998 with 100 recorded births. The name reached its all-time peak in 1996 with 131 births ranking #972. Since 1996, the popularity has decreased by 23.7%. In 1998, approximately 1 in every 19,113 boys born was named Kirby. FALLING Recent data shows the name is currently falling.