Rook is a distinctive boys' name in United States, ranking #3682 in 2018 with 30 recorded births. This places Rook in the top 26% 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 2018, approximately 1 in every 60,516 boys born was named Rook. STABLE Recent data shows the name is currently stable.