Sebastien is a distinctive boys' name in United States, ranking #1357 in 2015 with 129 recorded births. The name reached its all-time peak in 2007 with 178 births ranking #1058. Since 1996, the popularity has increased by 101.6%. In 2015, approximately 1 in every 14,855 boys born was named Sebastien. FALLING Recent data shows the name is currently falling.