Kirby is a distinctive boys' name in United States, ranking #972 in 1996 with 131 recorded births. This places Kirby in the top 9% of ranked US boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 1996 with 131 births ranking #972. In 1996, approximately 1 in every 14,460 boys born was named Kirby. FALLING Recent data shows the name is currently falling.