Follower of Christ
Crissa is a modern diminutive or short form of Christina or Carissa. It shares the etymological roots of the Greek word 'christos', meaning 'anointed', and has evolved as a standalone name in English-speaking countries.
Less common today
Crissa isn't in the latest US Top 1000. It last peaked at #5,956 in 1990.
US births per 5-year period, 1990βpresent (SSA data).