Kellen is a distinctive girls' name in United States, ranking #6009 in 2012 with 22 recorded births. The name reached its all-time peak in 1996 with 37 births ranking #3186. Since 1996, the popularity has decreased by 40.5%. In 2012, approximately 1 in every 80,034 girls born was named Kellen. FALLING Recent data shows the name is currently falling.