Cullin is a distinctive boys' name in United States, ranking #3636 in 2001 with 23 recorded births. The name reached its all-time peak in 2000 with 23 births ranking #3558. Since 1996, the popularity has increased by 27.8%. In 2001, approximately 1 in every 84,471 boys born was named Cullin. FALLING Recent data shows the name is currently falling.