Kain is a distinctive boys' name in United States, ranking #1346 in 2001 with 96 recorded births. The name reached its all-time peak in 2016 with 180 births ranking #1093. Since 1996, the popularity has increased by 14.3%. In 2001, approximately 1 in every 20,238 boys born was named Kain. STABLE Recent data shows the name is currently stable.