Gracious
Shiane is a modern phonetic variant of Cheyenne, a name derived from the Dakota Sioux word 'shaiyena'. It is also frequently interpreted as a creative spelling of Shane or Sian, which are derivatives of John, meaning 'God is gracious'.
Less common today
Shiane isn't in the latest US Top 1000. It last peaked at #3,149 in 1997.
US births per 5-year period, 1990βpresent (SSA data).