Kailen is a distinctive girls' name in United States, ranking #8188 in 2016 with 14 recorded births. The name reached its all-time peak in 2007 with 41 births ranking #3880. Since 1996, the popularity has decreased by 22.2%. In 2016, approximately 1 in every 126,535 girls born was named Kailen. FALLING Recent data shows the name is currently falling.