Brain is a distinctive boys' name in United States, ranking #3072 in 2001 with 29 recorded births. This places Brain in the top 25% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 32 births ranking #2602. In 2001, approximately 1 in every 66,994 boys born was named Brain. FALLING Recent data shows the name is currently falling.