Sebastain first appears in the U.S. registration record in 1918. Its popularity climbed over the following decades. In 2002, 24 babies received the name (ranked #3649). Today it sits well outside the top 1,000 (around #7984), with roughly 11 babies named Sebastain each year. Sebastain's usage has held roughly steady recently. In total, around 500 babies have been registered with this name since 1880.