Kailyn is a distinctive girls' name in United States, ranking #992 in 2018 with 264 recorded births. The name reached its all-time peak in 2011 with 793 births ranking #397. Since 1996, the popularity has decreased by 10.5%. In 2018, approximately 1 in every 6,441 girls born was named Kailyn. FALLING Recent data shows the name is currently falling.