Sebastien is a distinctive boys' name in United States, ranking #2316 in 2020 with 59 recorded births. This places Sebastien in the top 16% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 178 births ranking #1058. In 2020, approximately 1 in every 29,238 boys born was named Sebastien. FALLING Recent data shows the name is currently falling.