Cullan is a distinctive boys' name in United States, ranking #5371 in 1999 with 12 recorded births. This places Cullan in the top 46% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2000 with 21 births ranking #3795. In 1999, approximately 1 in every 160,007 boys born was named Cullan. STABLE Recent data shows the name is currently stable.