A Christian; follower of Christ
Keirstin is a modern phonetic 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 gained some traction in the late 20th century but remains a rare alternative to the more traditional Kirsten or Kristen.
Less common today
Keirstin isn't in the latest US Top 1000. It last peaked at #3,737 in 1992.
US births per 5-year period, 1990–present (SSA data).
