Cailen is a distinctive boys' name in United States, ranking #6796 in 2003 with 10 recorded births. This places Cailen in the bottom 47% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 17 births ranking #5238. Since 1996, the popularity has increased by 42.9%. In 2003, approximately 1 in every 197,527 boys born was named Cailen. RISING Recent data shows the name is currently rising.