Cailyn is a distinctive girls' name in United States, ranking #2587 in 2018 with 67 recorded births. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has decreased by 28.7%. In 2018, approximately 1 in every 25,379 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.