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).
Tiffany
Tiffany is now well below its former popularity. All-time it's been given to 364,020 U.S. babies, the 1,387th most common name by sound today, peaking at 19,357 in 1988, with 311 in 2025.
By sound, Tiffany also includes the spellings Tiffani, Tiffanie.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).