Cain is a distinctive boys' name in United States, ranking #988 in 2009 with 200 recorded births. The name reached its all-time peak in 2014 with 330 births ranking #726. Since 1996, the popularity has increased by 50.4%. In 2009, approximately 1 in every 9,917 boys born was named Cain. FALLING Recent data shows the name is currently falling.