Cullen is a distinctive boys' name in United States, ranking #1129 in 2024 with 187 recorded births. This places Cullen in the top 8% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2010 with 679 births ranking #413. Since 1996, the popularity has decreased by 52.3%. In 2024, approximately 1 in every 9,173 boys born was named Cullen. FALLING Recent data shows the name is currently falling.