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).
Elliott climbed for decades and has been a steadily popular name ever since. All-time it's been given to 144,819 U.S. babies, the 110th most common name by sound today, peaking at 6,164 in 2017, with 5,583 in 2025.
By sound, Elliott also includes the spellings Elliot, Eliot, Ellyette.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).