Kellen is a moderately popular boys' name in United States, ranking #447 in 2008 with 628 recorded births. This places Kellen in the top 3% of ranked US boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2012 with 932 births ranking #337. Since 1996, the popularity has increased by 203.4%. In 2008, approximately 1 in every 3,248 boys born was named Kellen. FALLING Recent data shows the name is currently falling.