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).
Ty
Ty is now well below its former popularity. All-time it's been given to 58,861 U.S. babies, the 1,142nd most common name by sound today, peaking at 2,797 in 2005, with 411 in 2025.
By sound, Ty also includes the spellings Tye, Tai.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).