Kain is a distinctive boys' name in United States, ranking #1321 in 2021 with 141 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 67.9%. In 2021, approximately 1 in every 12,399 boys born was named Kain. STABLE Recent data shows the name is currently stable.