Rook is a distinctive boys' name in United States, ranking #6334 in 2008 with 14 recorded births. This places Rook in the top 43% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 78 births ranking #1972. In 2008, approximately 1 in every 145,711 boys born was named Rook. STABLE Recent data shows the name is currently stable.