Man from Sebaste
Sabastain is a rare spelling variant of Sebastian. It originates from the Greek name Sebastos, which was used to translate the Latin title Augustus, meaning venerable or revered. Sebaste was also the name of several cities in the ancient world.
Less common today
Sabastain isn't in the latest US Top 1000. It last peaked at #7,757 in 1994.
US births per 5-year period, 1990βpresent (SSA data).