Cailyn is a distinctive girls' name in United States, ranking #1161 in 2003 with 186 recorded births. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has increased by 97.9%. In 2003, approximately 1 in every 9,823 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.