Gracious
A modern American elaboration of Jane or Jennifer, likely influenced by the popularity of Vanessa. It combines the traditional roots of Jane, meaning 'God is gracious,' with a rhythmic, contemporary suffix.
Less common today
Jennessa isn't in the latest US Top 1000. It last peaked at #3,905 in 1991.
US births per 5-year period, 1990βpresent (SSA data).