Kellen is a distinctive girls' name in United States, ranking #5839 in 2011 with 23 recorded births. The name reached its all-time peak in 1996 with 37 births ranking #3186. Since 1996, the popularity has decreased by 37.8%. In 2011, approximately 1 in every 76,470 girls born was named Kellen. FALLING Recent data shows the name is currently falling.