God has answered
Janaiyah is a modern American creation, likely a combination of the Hebrew name Janae and the suffix -iyah. It shares the root meaning of 'God is gracious' or 'God has answered' found in the name Jane and its variants.
Less common today
Janaiyah isn't in the latest US Top 1000. It last peaked at #7,832 in 2010.
US births per 5-year period, 1990βpresent (SSA data).