Sebastain is a distinctive boys' name in United States, ranking #8051 in 2018 with 10 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3649. Since 1996, the popularity has increased by 66.7%. In 2018, approximately 1 in every 181,547 boys born was named Sebastain. STABLE Recent data shows the name is currently stable.