Likely a modern variant of Kirsten or Karsten
Kestin is a rare name with ambiguous roots, most likely emerging as a modern phonetic variant of the Scandinavian Karsten or the Scottish Kirsten. In some contexts, it is associated with the Germanic name Christian, meaning 'follower of Christ'. Its usage in the United States is contemporary and quite rare.
Fewer than 5 boys were named Kestin in 2025.
US births per 5-year period, 1990–present (SSA data).