Sebastien is a distinctive boys' name in United States, ranking #1067 in 2005 with 156 recorded births. The name reached its all-time peak in 2007 with 178 births ranking #1058. Since 1996, the popularity has increased by 143.8%. In 2005, approximately 1 in every 12,802 boys born was named Sebastien. FALLING Recent data shows the name is currently falling.