God has answered
A modern American coinage likely blending the prefix 'Jen' with the biblical suffix '-aiah'. It is often interpreted as a variation of Janna or Anaiah, carrying the Hebrew sentiment of divine response or favor.
Less common today
Jenaiah isn't in the latest US Top 1000. It last peaked at #3,061 in 2025.
US births per 5-year period, 1990βpresent (SSA data).