Kellen is a moderately popular boys' name in United States, ranking #337 in 2012 with 932 recorded births. This places Kellen in the top 2% 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 350.2%. In 2012, approximately 1 in every 2,035 boys born was named Kellen. FALLING Recent data shows the name is currently falling.