Maclain is a distinctive boys' name in United States, ranking #6249 in 2010 with 14 recorded births. This places Maclain in the top 44% 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 2010, approximately 1 in every 137,029 boys born was named Maclain. FALLING Recent data shows the name is currently falling.