Gracious
Joniece is a modern American blend, likely combining the name John (meaning 'God is gracious') with the suffix -iece, possibly influenced by names like Bernice or Niecy. It follows a mid-20th-century trend of creating unique feminine forms of traditional masculine names.
Less common today
Joniece isn't in the latest US Top 1000. It last peaked at #9,282 in 1993.
US births per 5-year period, 1990βpresent (SSA data).