Cain is a distinctive boys' name in United States, ranking #1239 in 2006 with 135 recorded births. This places Cain in the top 9% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2014 with 330 births ranking #726. In 2006, approximately 1 in every 15,223 boys born was named Cain. FALLING Recent data shows the name is currently falling.