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).
Terrence
Terrence is now well below its former popularity. All-time it's been given to 178,320 U.S. babies, the 1,369th most common name by sound today, peaking at 3,450 in 1964, with 263 in 2025.
By sound, Terrence also includes the spellings Terrance, Terence.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).