Cailyn is a distinctive girls' name in United States, ranking #3009 in 2021 with 55 recorded births. This places Cailyn in the top 17% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has decreased by 41.5%. In 2021, approximately 1 in every 29,813 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.