Gracious
Jnai is a modern American phonetic variation of Janae, which itself is a derivative of Jane. It ultimately traces back to the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Jnai isn't in the latest US Top 1000. It last peaked at #7,326 in 1993.
US births per 5-year period, 1990βpresent (SSA data).