Gracious
Sheanna is a modern English creation, likely blending the prefix 'She-' with the name Anna. It serves as a phonetic variant of Shana or Seana, ultimately deriving from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Sheanna isn't in the latest US Top 1000. It last peaked at #6,954 in 1992.
US births per 5-year period, 1990βpresent (SSA data).