Follower of Christ
Kirsta is a rare variant of Kirsten or Christina, ultimately derived from the Greek name Christos. It emerged as a distinct but uncommon spelling, likely influenced by the phonetics of names like Krista and Kirsten.
Less common today
Kirsta isn't in the latest US Top 1000. It last peaked at #5,801 in 1991.
US births per 5-year period, 1990βpresent (SSA data).