Gracious
Jianni is a modern phonetic variant of Gianni, which is the Italian diminutive of Giovanni. It ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'. While traditionally masculine in its Italian roots, it is used as a unisex name in the United States.
Less common today
Jianni isn't in the latest US Top 1000. It last peaked at #3,503 in 2022.
US births per 5-year period, 1990βpresent (SSA data).