Cailen is a distinctive boys' name in United States, ranking #5594 in 2009 with 16 recorded births. The name reached its all-time peak in 2007 with 17 births ranking #5238. Since 1996, the popularity has increased by 128.6%. In 2009, approximately 1 in every 123,957 boys born was named Cailen. RISING Recent data shows the name is currently rising.