Kallen is a distinctive boys' name in United States, ranking #4525 in 1998 with 15 recorded births. This places Kallen in the top 40% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 159 births ranking #1177. In 1998, approximately 1 in every 127,421 boys born was named Kallen. STABLE Recent data shows the name is currently stable.