Brook is a distinctive boys' name in United States, ranking #1933 in 1997 with 47 recorded births. The name reached its all-time peak in 1997 with 47 births ranking #1933. Since 1996, the popularity has increased by 14.6%. In 1997, approximately 1 in every 40,108 boys born was named Brook. FALLING Recent data shows the name is currently falling.