Kelsen is a distinctive boys' name in United States, ranking #10155 in 2006 with 7 recorded births. This places Kelsen in the bottom 28% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 14 births ranking #6264. In 2006, approximately 1 in every 293,588 boys born was named Kelsen. FALLING Recent data shows the name is currently falling.