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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).
Ariella
Ariella has been climbing in recent years. All-time it's been given to 26,271 U.S. babies, the 419th most common name by sound today, peaking at 1,987 in 2020, with 1,940 in 2025.
By sound, Ariella also includes the spellings Ariela, Aeriella.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).