Maclain is a distinctive boys' name in United States, ranking #4453 in 2007 with 22 recorded births. This places Maclain in the top 31% 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 57.1%. In 2007, approximately 1 in every 94,329 boys born was named Maclain. FALLING Recent data shows the name is currently falling.