Sebastyen is a distinctive boys' name in United States, ranking #12449 in 2003 with 5 recorded births. This places Sebastyen in the bottom 2% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2003 with 5 births ranking #12449. In 2003, approximately 1 in every 395,054 boys born was named Sebastyen. STABLE Recent data shows the name is currently stable.