Kain is a distinctive boys' name in United States, ranking #1351 in 2002 with 98 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 16.7%. In 2002, approximately 1 in every 19,811 boys born was named Kain. STABLE Recent data shows the name is currently stable.