Cain is a distinctive boys' name in United States, ranking #1022 in 2002 with 150 recorded births. The name reached its all-time peak in 2014 with 330 births ranking #726. Since 1996, the popularity has increased by 12.8%. In 2002, approximately 1 in every 12,943 boys born was named Cain. FALLING Recent data shows the name is currently falling.