Kirby is a distinctive boys' name in United States, ranking #2643 in 2009 with 47 recorded births. The name reached its all-time peak in 1996 with 131 births ranking #972. Since 1996, the popularity has decreased by 64.1%. In 2009, approximately 1 in every 42,198 boys born was named Kirby. FALLING Recent data shows the name is currently falling.