Gracious
Shantina is a modern American creation, likely formed by combining the prefix 'Shan' (inspired by names like Shannon or Shana) with the suffix 'tina'. It is often associated with the meaning of Jane or Joan, which both derive from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Shantina isn't in the latest US Top 1000. It last peaked at #4,145 in 1991.
US births per 5-year period, 1990βpresent (SSA data).