Gracious
Jiovanna is a creative American spelling of the Italian name Giovanna. It is the feminine form of Giovanni, which is the Italian equivalent of John, ultimately derived from the Hebrew name Yochanan.
Less common today
Jiovanna isn't in the latest US Top 1000. It last peaked at #9,443 in 1994.
US births per 5-year period, 1990βpresent (SSA data).