Kailen is a distinctive girls' name in United States, ranking #4864 in 2009 with 30 recorded births. The name reached its all-time peak in 2007 with 41 births ranking #3880. Since 1996, the popularity has increased by 66.7%. In 2009, approximately 1 in every 61,229 girls born was named Kailen. FALLING Recent data shows the name is currently falling.