A Christian; follower of Christ
Kearstin is a modern American spelling 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. This specific spelling is rare and offers a unique phonetic twist on a traditional name.
Less common today
Kearstin isn't in the latest US Top 1000. It last peaked at #2,976 in 1994.
US births per 5-year period, 1990βpresent (SSA data).