Sebastien is a distinctive boys' name in United States, ranking #1276 in 1999 with 97 recorded births. The name reached its all-time peak in 2007 with 178 births ranking #1058. Since 1996, the popularity has increased by 51.6%. In 1999, approximately 1 in every 19,795 boys born was named Sebastien. FALLING Recent data shows the name is currently falling.