Kain is a distinctive boys' name in United States, ranking #1458 in 2008 with 113 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 34.5%. In 2008, approximately 1 in every 18,053 boys born was named Kain. STABLE Recent data shows the name is currently stable.