Kain is a distinctive boys' name in United States, ranking #1532 in 2007 with 103 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 22.6%. In 2007, approximately 1 in every 20,148 boys born was named Kain. STABLE Recent data shows the name is currently stable.