Kain is a distinctive boys' name in United States, ranking #1257 in 1999 with 99 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 17.9%. In 1999, approximately 1 in every 19,395 boys born was named Kain. STABLE Recent data shows the name is currently stable.