Kullen is a distinctive boys' name in United States, ranking #5806 in 2007 with 15 recorded births. This places Kullen 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 2012 with 64 births ranking #2119. In 2007, approximately 1 in every 138,349 boys born was named Kullen. FALLING Recent data shows the name is currently falling.