Maclain is a distinctive boys' name in United States, ranking #4918 in 2004 with 17 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #4453. Since 1996, the popularity has increased by 21.4%. In 2004, approximately 1 in every 116,753 boys born was named Maclain. FALLING Recent data shows the name is currently falling.