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).
Tonya
Tonya is now well below its former popularity. All-time it's been given to 279,005 U.S. babies, the 1,835th most common name by sound today, peaking at 14,127 in 1974, with 144 in 2025.
By sound, Tonya also includes the spellings Tanya, Tania, Tonja, Tawnya.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).