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).
Clarence
Clarence is now well below its former popularity. All-time it's been given to 309,501 U.S. babies, the 2,097th most common name by sound today, peaking at 7,462 in 1921, with 117 in 2025.
By sound, Clarence also includes the spellings Clarance.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).