Cailyn is a distinctive girls' name in United States, ranking #1336 in 1997 with 129 recorded births. The name reached its all-time peak in 2009 with 401 births ranking #723. Since 1996, the popularity has increased by 37.2%. In 1997, approximately 1 in every 13,493 girls born was named Cailyn. FALLING Recent data shows the name is currently falling.