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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).
Antonella
Antonella has been climbing in recent years. All-time it's been given to 10,576 U.S. babies, the 633rd most common name by sound today, peaking at 1,333 in 2024, with 1,087 in 2025.
Antonella has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).