Gracious
Janiaya is a modern American creation, likely a blend of the name Jane or Jan with the popular suffix -aya. It shares the etymological roots of Jane and John, ultimately derived from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Janiaya isn't in the latest US Top 1000. It last peaked at #5,741 in 2004.
US births per 5-year period, 1990βpresent (SSA data).