Cailyn is a distinctive girls' name in United States, ranking #1328 in 2014 with 178 recorded births. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has increased by 89.4%. In 2014, approximately 1 in every 10,033 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.