Kain is a distinctive boys' name in United States, ranking #1770 in 2004 with 71 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has decreased by 15.5%. In 2004, approximately 1 in every 27,955 boys born was named Kain. STABLE Recent data shows the name is currently stable.