Kailen is a distinctive girls' name in United States, ranking #8682 in 2015 with 13 recorded births. The name reached its all-time peak in 2007 with 41 births ranking #3880. Since 1996, the popularity has decreased by 27.8%. In 2015, approximately 1 in every 137,281 girls born was named Kailen. FALLING Recent data shows the name is currently falling.