Maclain is a distinctive boys' name in United States, ranking #4956 in 2003 with 16 recorded births. The name reached its all-time peak in 2007 with 22 births ranking #4453. Since 1996, the popularity has increased by 14.3%. In 2003, approximately 1 in every 123,454 boys born was named Maclain. FALLING Recent data shows the name is currently falling.