Cailean is a distinctive boys' name in United States, ranking #12812 in 2008 with 5 recorded births. This places Cailean in the bottom 12% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 9 births ranking #6052. Since 1996, the popularity has decreased by 44.4%. In 2008, approximately 1 in every 407,989 boys born was named Cailean. STABLE Recent data shows the name is currently stable.