Gracious
Janei is a modern American variant of Jane, which ultimately derives from the Hebrew name Yochanan. It follows the trend of adding a phonetic 'ee' or 'ay' ending to classic names to create a more contemporary sound.
Less common today
Janei isn't in the latest US Top 1000. It last peaked at #9,421 in 1997.
US births per 5-year period, 1990βpresent (SSA data).