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).
Aitana has been climbing in recent years. All-time it's been given to 9,804 U.S. babies, the 541st most common name by sound today, peaking at 1,460 in 2024, with 1,435 in 2025.
Aitana has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).