Gracious
Sianni is a modern American elaboration of the Welsh name Sian, which is the equivalent of Jane or Joan. It ultimately derives from the Hebrew name Yochanan, meaning 'God is gracious'.
Less common today
Sianni isn't in the latest US Top 1000. It last peaked at #1,629 in 2025.
US births per 5-year period, 1990–present (SSA data).
