Kayelyn is a distinctive girls' name in United States, ranking #7794 in 2000 with 13 recorded births. The name reached its all-time peak in 1999 with 14 births ranking #7031. Since 1996, the popularity has increased by 85.7%. In 2000, approximately 1 in every 139,690 girls born was named Kayelyn. RISING Recent data shows the name is currently rising.