Gracious
Shianna is a modern American elaboration of Shianne or Cheyenne, often influenced by the name Anna. While it is frequently associated with the Cheyenne people, as a given name it is often treated as a phonetic blend or a variant of Jane, meaning 'God is gracious'.
Less common today
Shianna isn't in the latest US Top 1000. It last peaked at #2,193 in 1997.
US births per 5-year period, 1990βpresent (SSA data).