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).
Ayaan has been climbing in recent years. All-time it's been given to 14,096 U.S. babies, the 696th most common name by sound today, peaking at 1,047 in 2025, with 1,047 in 2025.
By sound, Ayaan also includes the spellings Ayan.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).