Gracious
Joniah is a rare modern elaboration of the Hebrew name Jonah or a variation of the name Jonia, likely influenced by the popular 'iah' suffix found in biblical names like Josiah or Jedidiah. It carries the traditional meaning of divine favor and grace.
Less common today
Joniah isn't in the latest US Top 1000. It last peaked at #8,996 in 2003.
US births per 5-year period, 1990βpresent (SSA data).