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).
Vincent
Vincent has stayed fairly steady in American naming for generations. All-time it's been given to 364,716 U.S. babies, the 235th most common name by sound today, peaking at 6,186 in 1962, with 3,272 in 2025.
Vincent has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).