Rudolf entered U.S. records in 1882, near the turn of the 20th century. Its popularity climbed over the following decades. In 1927, 82 babies received the name (ranked #720). Today it sits well outside the top 1,000 (around #10764), with roughly 7 babies named Rudolf each year. Rudolf's usage has held roughly steady recently. In total, around 2,951 babies have been registered with this name since 1880.