Sebastien is a distinctive boys' name in England & Wales, ranking #627 in 2009 with 51 recorded births. The name reached its all-time peak in 2014 with 70 births ranking #534. Since 1996, the popularity has increased by 218.8%. In 2009, approximately 1 in every 6,630 boys born was named Sebastien. STABLE Recent data shows the name is currently stable.