Cullan is a distinctive boys' name in United States, ranking #3795 in 2000 with 21 recorded births. The name reached its all-time peak in 2000 with 21 births ranking #3795. Since 1996, the popularity has increased by 61.5%. In 2000, approximately 1 in every 93,521 boys born was named Cullan. STABLE Recent data shows the name is currently stable.