A follower of Christ
Kurstin is a modern phonetic variant of Kirsten, which is the Scandinavian form of Christina. It ultimately derives from the Greek name Christos, referring to a follower of the Christian faith. While less common than its counterparts, it retains a clear connection to its religious roots.
Less common today
Kurstin isn't in the latest US Top 1000. It last peaked at #3,778 in 1996.
US births per 5-year period, 1990βpresent (SSA data).