Madlyn entered U.S. records in 1898, near the turn of the 20th century. Its popularity climbed over the following decades. In 1922, 76 babies received the name (ranked #843). Today it sits well outside the top 1,000 (around #10375), with roughly 10 babies named Madlyn each year. Madlyn's usage has held roughly steady recently. In total, around 2,370 babies have been registered with this name since 1880.