Cain is a distinctive boys' name in United States, ranking #958 in 2010 with 207 recorded births. The name reached its all-time peak in 2014 with 330 births ranking #726. Since 1996, the popularity has increased by 55.6%. In 2010, approximately 1 in every 9,268 boys born was named Cain. FALLING Recent data shows the name is currently falling.