Kellen is a moderately popular boys' name in United States, ranking #444 in 2014 with 672 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 224.6%. In 2014, approximately 1 in every 2,858 boys born was named Kellen. FALLING Recent data shows the name is currently falling.