A Christian
Kearsten is a modern American spelling variant of Kirsten, which is the Scandinavian form of Christina. It ultimately derives from the Latin name Christianus, meaning 'a follower of Christ'. While the 'Kear-' spelling is rare, it retains the traditional religious roots of its predecessors.
Less common today
Kearsten isn't in the latest US Top 1000. It last peaked at #3,748 in 1995.
US births per 5-year period, 1990βpresent (SSA data).