Sebastien is a distinctive boys' name in England & Wales, ranking #668 in 2001 with 27 recorded births. The name reached its all-time peak in 2014 with 70 births ranking #534. Since 1996, the popularity has increased by 68.8%. In 2001, approximately 1 in every 10,660 boys born was named Sebastien. STABLE Recent data shows the name is currently stable.