Kailyn is a distinctive girls' name in United States, ranking #803 in 2016 with 355 recorded births. The name reached its all-time peak in 2011 with 793 births ranking #397. Since 1996, the popularity has increased by 20.3%. In 2016, approximately 1 in every 4,990 girls born was named Kailyn. FALLING Recent data shows the name is currently falling.