Maclain is a distinctive boys' name in United States, ranking #4153 in 2000 with 19 recorded births. This places Maclain in the top 34% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 22 births ranking #4453. Since 1996, the popularity has increased by 35.7%. In 2000, approximately 1 in every 103,365 boys born was named Maclain. FALLING Recent data shows the name is currently falling.