Rook is a distinctive boys' name in United States, ranking #9398 in 2006 with 8 recorded births. This places Rook in the bottom 33% 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 2006, approximately 1 in every 256,890 boys born was named Rook. STABLE Recent data shows the name is currently stable.