Maclain is a distinctive boys' name in United States, ranking #9342 in 2013 with 8 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #4453. Since 1996, the popularity has decreased by 42.9%. In 2013, approximately 1 in every 236,407 boys born was named Maclain. FALLING Recent data shows the name is currently falling.