How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Gianni
Gianni has held a fairly steady level of use. All-time it's been given to 18,916 U.S. babies, the 736th most common name by sound today, peaking at 1,139 in 2020, with 735 in 2025.
Gianni has no common alternate spellings by sound.
Rising