Sebastien is a distinctive boys' name in United States, ranking #1023 in 2001 with 145 recorded births. The name reached its all-time peak in 2007 with 178 births ranking #1058. Since 1996, the popularity has increased by 126.6%. In 2001, approximately 1 in every 13,399 boys born was named Sebastien. FALLING Recent data shows the name is currently falling.