Maclain is a distinctive boys' name in United States, ranking #7361 in 2015 with 11 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #4453. Since 1996, the popularity has decreased by 21.4%. In 2015, approximately 1 in every 174,205 boys born was named Maclain. FALLING Recent data shows the name is currently falling.