Kallen is a distinctive boys' name in United States, ranking #1381 in 2012 with 122 recorded births. The name reached its all-time peak in 2014 with 159 births ranking #1177. Since 1996, the popularity has increased by 662.5%. In 2012, approximately 1 in every 15,546 boys born was named Kallen. STABLE Recent data shows the name is currently stable.