Brook is a distinctive boys' name in United States, ranking #4343 in 2002 with 18 recorded births. The name reached its all-time peak in 1997 with 47 births ranking #1933. Since 1996, the popularity has decreased by 56.1%. In 2002, approximately 1 in every 107,860 boys born was named Brook. FALLING Recent data shows the name is currently falling.