Kellen is a distinctive boys' name in United States, ranking #724 in 2001 with 242 recorded births. The name reached its all-time peak in 2012 with 932 births ranking #337. Since 1996, the popularity has increased by 16.9%. In 2001, approximately 1 in every 8,028 boys born was named Kellen. FALLING Recent data shows the name is currently falling.