Kellen is a distinctive girls' name in United States, ranking #5378 in 2015 with 25 recorded births. The name reached its all-time peak in 1996 with 37 births ranking #3186. Since 1996, the popularity has decreased by 32.4%. In 2015, approximately 1 in every 71,386 girls born was named Kellen. FALLING Recent data shows the name is currently falling.