Kellen is a distinctive boys' name in United States, ranking #700 in 2018 with 346 recorded births. The name reached its all-time peak in 2012 with 932 births ranking #337. Since 1996, the popularity has increased by 67.1%. In 2018, approximately 1 in every 5,247 boys born was named Kellen. FALLING Recent data shows the name is currently falling.