Caswell entered U.S. records in 1882, near the turn of the 20th century. Its popularity climbed over the following decades. In 1923, 14 babies received the name (ranked #2246). Today it sits well outside the top 1,000 (around #10378), with roughly 7 babies named Caswell each year. Caswell's usage has held roughly steady recently. In total, around 327 babies have been registered with this name since 1880.