Cailyn is a distinctive girls' name in United States, ranking #1185 in 1998 with 157 recorded births. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has increased by 67.0%. In 1998, approximately 1 in every 11,254 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.