Caswell is a distinctive boys' name in United States, ranking #10910 in 2025 with 6 recorded births. This places Caswell in the bottom 22% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2021 with 9 births ranking #8286. In 2025, approximately 1 in every 284,679 boys born was named Caswell. RISING Recent data shows the name is currently rising.