Maclain is a distinctive boys' name in United States, ranking #5073 in 1998 with 13 recorded births. This places Maclain in the top 45% 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. In 1998, approximately 1 in every 147,024 boys born was named Maclain. FALLING Recent data shows the name is currently falling.