Rupert appears in U.S. registration data going all the way back to 1880, when records begin. Its popularity climbed over the following decades. In 1920, 156 babies received the name (ranked #487). Today it sits well outside the top 1,000 (around #4752), with roughly 22 babies named Rupert each year. Rupert's usage has held roughly steady recently. In total, around 5,583 babies have been registered with this name since 1880.