Cullin is a distinctive boys' name in United States, ranking #12399 in 2006 with 5 recorded births. The name reached its all-time peak in 2000 with 23 births ranking #3558. Since 1996, the popularity has decreased by 72.2%. In 2006, approximately 1 in every 411,024 boys born was named Cullin. FALLING Recent data shows the name is currently falling.