Kailyn is a distinctive girls' name in United States, ranking #1038 in 2019 with 247 recorded births. The name reached its all-time peak in 2011 with 793 births ranking #397. Since 1996, the popularity has decreased by 16.3%. In 2019, approximately 1 in every 6,792 girls born was named Kailyn. FALLING Recent data shows the name is currently falling.