Kayly is a distinctive girls' name in United States, ranking #9899 in 1999 with 9 recorded births. The name reached its all-time peak in 2004 with 32 births ranking #4332. Since 1996, the popularity has increased by 12.5%. In 1999, approximately 1 in every 197,087 girls born was named Kayly. RISING Recent data shows the name is currently rising.