Sebastien is a distinctive boys' name in England & Wales, ranking #719 in 2015 with 46 recorded births. The name reached its all-time peak in 2014 with 70 births ranking #534. Since 1996, the popularity has increased by 187.5%. In 2015, approximately 1 in every 7,244 boys born was named Sebastien. STABLE Recent data shows the name is currently stable.