Kain is a distinctive boys' name in United States, ranking #1289 in 2012 with 136 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 61.9%. In 2012, approximately 1 in every 13,946 boys born was named Kain. STABLE Recent data shows the name is currently stable.