Dyon first appears in the U.S. registration record in 1969. Its popularity climbed over the following decades. In 1996, 12 babies received the name (ranked #4971). Today it sits well outside the top 1,000 (around #11185), with roughly 6 babies named Dyon each year. Dyon has been declining in recent years. In total, around 211 babies have been registered with this name since 1880.