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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).
Tony
Tony is now well below its former popularity. All-time it's been given to 366,111 U.S. babies, the 1,136th most common name by sound today, peaking at 11,562 in 1961, with 420 in 2025.
By sound, Tony also includes the spellings Toni, Toney, Tonie.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).