Brook is a distinctive boys' name in United States, ranking #2747 in 2000 with 33 recorded births. The name reached its all-time peak in 1997 with 47 births ranking #1933. Since 1996, the popularity has decreased by 19.5%. In 2000, approximately 1 in every 59,513 boys born was named Brook. FALLING Recent data shows the name is currently falling.