Definitions of Kirby:

• name:  A surname (common: 1 in 4545 families; popularity rank in the U.S.: #534)
• name:  A male given name (rare: 1 in 11111 males; popularity rank in the U.S.: #722)
• name:  A female given name (rare: 1 in 50000 females; popularity rank in the U.S.: #2719)