Holy, silver, or air
Aerianna is a modern elaboration of Arianna or Ariana. It likely blends the Greek 'Ariadne', meaning 'most holy', with the Latin 'aer' for air or the Welsh 'arian' for silver. Its usage is primarily a contemporary American creative spelling.
Less common today
Aerianna isn't in the latest US Top 1000. It last peaked at #4,272 in 2010.
US births per 5-year period, 1990βpresent (SSA data).